Can you please do a video on high protein diets? I'm considering eating 150+ grams of protein on my 16/8 IF days in order to curb hunger and not binge and regain fat from my 72hr fasts. But I've heard protein creates an insulin response, is that something I should be worried about?
Could you possibly do an analysis on the Phoenix Protocol ( August Dunning ) specifically Chapter 3 on water fasting. According to this book an extended water fast beyond a couple of days will result in heart muscle loss ! This sounds counter intuitive , how would we have survived in Hunter gatherer days if by drinking water while on a hunt ( and therefore not eating food ) the heart was destroyed. The medical information in Chapter 3 looks like it is well referenced to medical reports so not easily dismissed. Would appreciate an MD analysis thx
Hello Jason fung your videos are life saving!! I have a personal question to ask you may I know how old are you? I know you have a son but don't know your age. If you are 40 or above I'll be very surprised
@@victorguani8799 I also do OMAD now. Plus, I try to get in a 3 day fast every month or 2 for anti-aging & to regenerate the immune system (according to research done by Dr. Valter Longo). In the past I did more long fasts, like up to a week, but I'm happy with OMAD & a 3 day fast when I feel like it
I started fasting just under a year ago. I primarily do ADF and go 36 hours before I eat for roughly 6-12 hours. I was 307 lbs when I started fasting and walking and I’m now between 195-205 depending on the day. I’ve started adding kettlebell workouts 3-4 days a week and I’ve seen a huge increase in my lean mass. Dr. Fung is the main reason I started fasting. Thank you.
I lost 70lbs doing exactly what you are saying. Once I added resistance training while fasting I put on lean muscle and it completely changed my physique. One of the best decisions I've ever made!
This is about where I am now. Weight from 239 to 170 through fasting and LCHF with minimal processed foods. Although I am still overweight, I'm concerned about losing too much without having built up muscle. And also, losing so much that I one day become underweight. So, I've started with light weights at home. Any advice?
@@ivoivic2448 only a miserable person would come here to say something like your first comment… suffer by yourself man. Everyone else here is making changes for the better…
With Intermittent fasting and low carb high protein and average fat, more veg moderate nuts and fruits, eating more whole real food, avoiding junk and with Cardio and resistance training I lost 7 kg in one month and the best shape ..... I'm now in the best shape of my life, I'm 33 Yr and I've studied pharmacy and public health... Dr Fung is the most revolutionary man in the field of health and nutrition... The amount of nutrition knowledge I learnt in last one month is far better then my 10 yrs professional education
Dayum! That one-armed chin up casual flex by Dr Fung at 0:26. Dr Fung is flexing not only his intellectual strength but his physical strength as well! Respect!
Being jacked does bring credibility in the fitness and nurtrition space, especially among the bodybuilding bro community where I'm seeing a lot of attacks. Might as well, being jacked is a social asset and is pretty easy to manage (its just the consistency that's hard.) He has the equipment, that's the hardest part.
@@zulkefleeabdullah6068 It is the in-between progression of going from a two handed pull-up, to a one handed. It is much harder than a two handed pull-up, very impressive.
Been intermittently fasting, nutritious food and exercising for a period. Lost 25Ibs, now with 6-pack. I’m almost 67 years old, with the build - so I am repeatedly told - of a fit man in his mid-20s. Went through a phase in my 40s-60s when I was much, much heavier, and unhealthy. It’s all about the Holy Trinity: 1. FASTING 2. DIET (eating green leafy and cruciferous vegetables, oily fish, avocado, raw nuts etc) 3. EXERCISE - especially resistance training. Get that into a daily routine and you will look better, feel better and most important of all be healthier. Never too late to start!
He clarified in one video what dozens of fitness gurus have danced around conflicting “conclusions” about. 25 and have been intermittent fasting since I was 18/19. Perfect example of the difference between expertise and education.
Thanks for posting this. It's important to note that Terry Crews has said he does 16:8 and works out in the morning. He then continues fasting after his workout until 2pm. This means that his body is still pumping out HGH while his muscles are recovering. I'd be interested in hearing more about the studies behind this.
You might be interested in LeanGains by Martin Berkhan. Big fan of IF and quotes a lot of relevant studies on fasted training and different fasting + exercise protocols.
Very true! I did intermittent fasting everyday for the last 3 years and I gain lots of muscles and lost fat and at 44 years I m in the best shape of my life thanks to training fasted , thank you for your information really appreciate
This did not work for me. I got very limited muscle grow even when being a newbie. I started adding a little bit of sugars or carbs before workout and I grew in one month all I did not grow in 6 previous months. I think it has something to do with cortisol levels or something.
How perfect! I’m starting ADF with weight training. A beautiful friend who’s been weight lifting for years says that fasting and lifting don’t really go together, that lifting requires eating throughout every day to stay fueled and feed muscle growth. But I knew I could make it work, get all the benefits of fasting AND lose weight and build muscle. As long as I keep my feeding days high-protein and nutritionally dense. Appreciating this video and the comments.
This doctor I think was talking about NOT loosing muscle, not about gaining muscle. We have fuel in our body for about 1 day as glycogen. But when fasting where we get protein which we need all the time for blood for example?! I think we need to eat protein every day for just not to lose muscle.
@@SuperMrAndersen Dr. Fung noted that patients *gained* muscle while fasting. I know that I have. I've been doing mostly alternate day fasting for the past 7 montns, and am doing more exercises, more reps, and using heavier weights.
Hi Dr. Fung! So proud to be a small part of all the healing and good you bring to the world. Our bodies are wise! They aren’t going to loose muscle in long fasts or our ancestors would not have been successful hunters and we wouldn’t be here.
@bnza10 oh no, definitely not!! You’re wit, intelligence, and intellect, are all so refreshing!! Also, please be sure to procreate! Amongst a super, duper, crazy world, we need more people like you!! 😉
This message is so important. The first fasting I did was over 30 years ago but I stopped doing it because I was so afraid I would lose muscle! How I wish that I had know then what I do now, I would have been ripped that whole time.
I proved this is true for myself. I did my first 7-day water fast recently, at a point where my lifts were at their peak (bench, military press, lat pulls, etc). I lost 12 pounds during the fast. The first few days after the fast, I felt weak, of course, but within a week, I was right back at the same weights I was lifting and still about 7 pounds less bodyweight.
@@davidshillito I didn't eat anything for 7 days. It's pretty stressful on a body. At least that's my experience. If you don't feel any different after a 7-day fast, I envy you.
@@davidshillito cuz usually the first few days your body still expects food sources ... but after that period of time , it will be dependent on your body fat 100%
@@Ldenlord it goes for muscle first, bodyfat will always go last because it's more of a necessity to live. Studies are great, but most of the time they don't play out in real life. And fasting is the fastest way to loose muscle. Point blank period. It's got a ton of health benifits, but it's the absolute worst thing you can do if you want to build or maintain muscle mass. Intermittent fasting is much more doable, but still not ideal if building or maintaining muscle is a goal
@@smont4335 if that’s really how the body works we’d extinct the long ago ... imagine we wouldn’t be able to hunt for food for long period of time , and losing all that muscle how tf do we have to strength to hunt for more food when animals are finally available ???? Our body store fat for this SOLE reason , to use it for fuel when we can’t eat ... imagine you save up all those woods but then chop down and burn your house just for fire in the winters , that’s how stupid your argument sounds
🎯 Key Takeaways for quick navigation: 01:10 🏋️♂️ *Muscle growth or shrinkage depends on stress applied, not solely on diet. Adequate nutrition prevents using muscle for fuel unless body fat percentage is extremely low.* 02:20 📊 *Alternate daily fasting did not decrease lean mass (including muscle); in fact, it potentially increased it, compared to fat loss.* 03:42 🔄 *Fasting strategies were more effective at preserving lean mass (muscle) compared to chronic calorie restriction, with a 4x better result in lean mass preservation.* 04:09 ⚖️ *Growth hormone plays a crucial role in lean tissue maintenance. Fasting increases growth hormone, preserving lean muscle while promoting fat loss, without causing side effects like injected growth hormone.* 06:29 🍲 *Fasting utilizes glucose and fat stores for energy, not protein. Body doesn't use muscle for fuel if other energy sources are available.* 07:09 🕒 *Terry Crews practices a 16-hour daily fast, followed by an 8-hour eating window. Exercising in a fasted state can increase training intensity and recovery due to hormonal changes.* 08:04 🌟 *Training in a fasted state, as done by Terry Crews and other celebrities, offers benefits such as heightened training ability, faster recovery, and anti-aging benefits without significant side effects.*
Thank you Dr Fung this videos are so precious,I am 73 and doing every day 14 -17 hours fasting since last august and lost 12 kg also stop eating bread and doing weight training,use to be a binge eater 😊❤
I have 46 years old...i did fasting 45 hs just without thinking of it. My energy level was up to the top but i was afraid to go to the gym. I tried do some push up and did it 30 without any issues...Now you are giving me a new aspect. Thanks a lot! Regards from Argentina
I've been intermittent fasting for a while now, but want to try a longer fast to lose weight. I'm glad to know I don't need to worry about muscle loss 😃
Great content. "Storing up firewood for the winter and then as soon as it gets cold to chop up your sofa and throw that into the fire". Great analogy. BARZ!!!!! Thanks
I’m looking forward to another book. Maybe another “code” based book, like “The Fitness Code”. Keep up the good work and thank you for expanding my understanding.
I rather listen to Jason than to most fitness experts who say you shouldn't train fasted and you'll lose muscle. It makes sense that the body will preserve muscle as it has other sources of energy to use for function during times of not eating
I'm about to turn 34 and had done intermittent fasting maybe around 15 years ago... I liked it then but never knew HOW it worked or WHY. After a 7 year hiatus from fitness and I.F, I started the gym again but this time with more research and knowledge and a plan. I've been at the gym for about 1.5 years now starting with training 2 - 3 times a week for a year and only recently 6 days a week. I have always wondered why and how I could be building muscle even though I'm not having food or protein in my anabolic window after training and now I know why. I'm almost at the best shape I've ever been in my life. I'm close to a body builders physique and I couldn't be happier so far. Thanks Jason for explaining this it finally fills in the blanks as to what I've always wondered.
I am impressed that nobody is talking about the kamikaze warrior impression dr. Fung performs at the beginning and end of the video, it was amazing! Was it for a dare/losing a bet or is he just that fun(g)? Great video, one I will show to people that whine about losing muscle from fasting.
I started fasting every other day 2 weeks ago and have already had a drop in blood glucose and have had to tighten my bra strap around my torso 2 notches. So happy with this method. Thank you Dr. Fung!
@@shish_taouk I'm on day 8 of an 11 day fast--that makes it--what?--about 190 hours. Feeling good. And I used to fantasize about food all the time (even when I was eating every day). Now much less.
If you are doing a prolonged fast , how is your body going to repair muscle tissue when we aren’t consuming any protein ? This is what troubles me another doctor says you shouldn’t exercise.
Now age 47 and have been doing CR and IF (16/8) for around 6 months and working out fasted 3 mornings per week. Put on roughly 10-15 pounds, not around my belly. Was kinda surprised that I put on that much muscle mass while eating less then I used to.
I was sceptical, but I thought I had nothing to loose, tried "everything" else.. Been doing intermittent fasting and OMAD for the first time. Lost 30lbs in 28 days, and I feel great.
At carl. I have been fasting and low carb and sugar. The fasting is not bad but the brain fog gets me. Did you have brain fog and what did you you fix it ? Thanks
@@tulio3571 brain fog comes from the low carbs . but if you do it long enough it will pass because your body will adapt to use keytones . but you dont have to fast and do low carb but it helps
@@carlgeorgtsigakis498 did u get frail and lose ur muscles !?!? Please reply bro I've never been in shape in my life im so close il do anything at this point
Thank you Jason . Considering so many fasting videos off late , the reason I love your videos is hard core scientific evidence and it’s critical appraisal . Being a doctor myself into academics I always wonder only few people get the hard facts from a published paper . You make it easy for general audience too … that’s your one of X factor as well . Tremendous job and contribution to the society !! Keep going with all love and support …
He always has great materal. Iwatch him and dr. Berg as well as dr. Gillaspy. Dr. Fung has a nice sense of humor which is welcomed compared to some. I am day 9 of an extended fast. Early Feb i weighed in at 203 and this week I weighted in at 179.1 .... the journey continues as I learn to say bye to all forms of refined sugars.
How are you now? I also started losing weight in February but only discovered keto/IF in mid may. I was at 213 and i am now 180.2. Did you hit any plateaus along the way?
I Thank you man, you are funny too. I was able my lower my blood sugars from 16 to 5 in one week. that was in January 2021.will keep at it and keep everyone posted too.
Thanks Jason. That was reassuring. I need to fast for at least 40 hours each week (ie a full day and a night) as well as OMAD the other days. I thought I was doing OK and now you have confirmed it. I have nothing to worry about.
I have Weight training 5 to 6 times per week mostly before "Breaking FAST" each morning. In addition to my 16-8 Intermittent FASTING, I also include Prolonged Water Fasting (>36hrs) every 4 to 6 weeks. At the very end of those Prolonged Water FASTING, I usually take two Challenges which are Weighted Chin Up & Weighted Rings Dips. I've never got disappointed, cause I make my New personal Best every time with so-called empty stomach - in fact I'm not that hungry even though I have no food for 36+ hours.
I am doing fasted cross country skiing. Recently did 15km fasted no problem whatsoever. I lost 4kg and and I am the leanest I have been in years. HbA1C is 5% and aiming for sub 5% in a month.
It is just great.. i have lost 16 kg in 16 weeks thanks to you Jason.. my family was worried that i might be losing muscle but this removes all doubts.. i have reversed 5 years of my age in less than 5 months.. and feel a lot fitter.. on top, i can eat anything i want without worrying about calories.. thanks a lot Jason for changing so many lives.. only my tummy remains and guess i need to start exercising soon
I have three of your books (I have no diabetes but was interested in reading your book on that before I gifted it to a diabetic friend). Over the past 3 years and mostly due to YOUR very clear but detailed information, I have lost the 17 kilos I had too much of and was insulin resistant. I am definitely keto and fast daily, either 16/8, 22 or 24 hours and feel so much healthier and better for it. Thank you for your work and glad to see you more on RUclips!
This video provides an insightful explanation backed by scientific studies, debunking common myths about fasting and muscle loss. It's truly eye-opening to understand how fasting can actually preserve lean muscle mass and offer various health benefits. The presenter's clear explanation and evidence-based approach are highly appreciated. Many thanks for sharing this valuable information!
The 2 studies you quoted. First study was targeting obese participants, which may not apply to patients who are lighter, as the health benefits of weight loss in obese patients are likely to be far higher. Second study actually showed that there is a loss of lean mass even in the fasting group, which contradicts your message saying fasting doesn't cause muscle mass loss.
Fung always targets obeses. Obeses are in protein sparing mode anyway, let's not fall for this trap. I.F. will burn your muscles if you don' take care.
If you've been storing up sofa analogies all this time would you suddenly chop it up and throw it on the fire and use an icebox analogy instead? No, of course not!
I have done 7-day water fast 3 times and had great results. I struggled badly with headaches the first 2 times. The third time, I ate once a day (higher fat and minimal carbs from vegetables only) for 5 days prior to my 7-day water fast. I had no headaches, and the difficult first 3 days were not as much of a grind to get through. I think everyone should try a 7-day fast once in there life time to gain control over your mind. I am more patient (no snaking throughout the day) about food, and try to minimize the quick (unhealthy) food options. I now intermittent fast where I eat in a 2 hr window daily. If I have a social reason to indulge over the weekend, I will fast for 48 hrs prior to or after the indulgence. Then, go right back into my routine.
WRONG [00:26] ··· CHINUP ::: one word ::: upgrip [supinate grip] ··· PULLUP ::: one word ::: downgrip [pronate grip] ··· sundry singles ::: situp, pushup, deadlift, etcetera BUDAPEST 2021 FEBRUARY 16 8.3 AM
I'm 40 years old... and I have been living with food addiction my whole life. I couldn't stay hungry as I would get wind/gas trapped in my back which would cause me severe pain. I've been living with this problem since I was around 18 to 20 years old. This led me to food addiction. My whole life, I've been eating a heavy meal every 3 hours. If I'm awake till late, I would eat at night as well. Sweetcakes were my best friends. I would be eating cakes between my meals. And also, my aunt got an ulcer and I was told it was because she wasn't eating on time. A lot of more people had got some medical issues which they said was due to not eating on time. So, this back pain, the fright of ulcer(and probably other unknown medical issues), and the ghrelin hormone were the reasons that I always thought fasting would be dangerous. Maybe 2 times, I tried 16:8 intermittent fasting, but it turned out, I would eat a lot in my eating window and would still gain weight. But thanks mainly to Dr Fung followed by Dr Berg, I dared to try 4 days of fasting a few weeks ago. I consumed a lot of hot water, one multi-vitamin tablet per day, medicine for my gas accumulation in my back, and a cup of coffee with milk per day. This experience has changed my life. I still keep my medicine for trapped gas, but I feel I need it lesser, the more I get my stomach used to fasting. I can eat one meal per day, and I feel fine. And I'm losing weight. I will have to do at least 3-day fasting from time to time so that I don't get back to my food addiction. But so far, even if I think of cakes, when I eat them, I cannot enjoy them because my internal system has changed. I now can enjoy eating cucumber and oranges with salt. Before, these weren't considered as food to me. I still consume fast food frequently, and I'm still losing weight. Because I don't eat frequently...(If that makes sense)
@@michaelmatthews2126 My favorite is 'Gastrogel'. But since this is not available on the market, for the time being, I'm taking 'Gastrolex'. I've used 'Gaviscon' and 'Mallox' as well.
Genuinely important to prioritise protein and resistance training if you do fasting for any length of time. Difficult for the body to absorb enough in a smaller window, just need to be mindful.
I just finished Dry fasting (No food+water) 24h + 48h of water fasting (no food) Lost 3kg in 3 days even tho it wasn't even a goal in the whole fasting. The body was doing great on day 0, and whole day 1 and two. The third one was a bit rough. Didn't lose any muscles during
Been doing intermittent fasting for about 10 years now and still gaining strength and muscle every workout. No problem at all and it’s fasting that finally gave me visible abs. Edit: And I’m 40 years old but look like I’m in my twenties.
I have around 30 lbs of fat that I want to get rid of, mostly belly fat. I recently started fasting 40-48-hours once a month, but I am going to change it to weekly. This video answered my question about maintaining my muscle, since I do weights a minimum of three times a week. I'm going to do more workout during fasting as well.
Thank you doctor for easy, simple and straight forward answer to the burning question in the bodybuilding community. I learn a lot about bodybuilding also from this video of yours, that was really great. You just reduced the 300-600 pages of bodybuilding books on how to build a muscle to 2 spoken sentences. That's really incredible. Thank you again. This video of yours is not just on query of fasting and muscle loss, it is about building lean mass, getting bigger in healthy manner and lot more about staying fit and health. Thank you doctor for all your efforts to make complicated topic easy and simple but at the same time profound. 🙏👍
Fasting brought me back to 28 YO when I was looking like 45 YO actually I’m almost 40 and doing IF now 3 years. I thought I lost muscle too but the truth that was only fat around muscles
Love this...however if a person fasts and then goes for a long run, the body cannot convert fat fast enough to create energy. That is why runners hit the wall when glycogen is depleated.
Great Video Jason! I’m finding great muscle building amd fat loss with fasting from 2pm then training fasted at 6:30am the next morning then able to lower cortisol by eating pretty much after training .....till 2pm....I’ve also read studies where this works in better with the circadian rythm as you’re consuming most calories in the day earlier then fasting evening / night the way our bodies are designed , with restorative/ repair processes occuring at night in the absence of insulin .....my sleep has been much deeper and better quality since doing this too ......once a week I will have a carb only meal at around 5 or 6 to restore glycogen for training and the benefit is also serotonin for sleep , but I don’t eat anything after sunset and I’m finding it so much better in many ways !
The body use amino acid from muscles when you re fasting during neoglucogenosis, that's a fact. Glucose produce is used by glucose dependent organs such as brain. Thus, during fasting you use your glucose stock and fat stock, until a certain level of deprivation. Then your recycle your muscles.
![Noob To Max With DRAGON REWORK In Blox Fruits [FULL MOVIE]](http://i.ytimg.com/vi/LnBMOinoOvA/mqdefault.jpg)
Learn more about Fasting - Solving the Two-Compartment Problem - ruclips.net/video/ETkwZIi3R7w/видео.html
LOL hey jason I have the same inspire fitness equipment great machine durring times like this
Can you please do a video on high protein diets? I'm considering eating 150+ grams of protein on my 16/8 IF days in order to curb hunger and not binge and regain fat from my 72hr fasts. But I've heard protein creates an insulin response, is that something I should be worried about?
Could you possibly do an analysis on the Phoenix Protocol ( August Dunning ) specifically Chapter 3 on water fasting. According to this book an extended water fast beyond a couple of days will result in heart muscle loss ! This sounds counter intuitive , how would we have survived in Hunter gatherer days if by drinking water while on a hunt ( and therefore not eating food ) the heart was destroyed. The medical information in Chapter 3 looks like it is well referenced to medical reports so not easily dismissed. Would appreciate an MD analysis thx
Hello Jason fung your videos are life saving!! I have a personal question to ask you may I know how old are you? I know you have a son but don't know your age. If you are 40 or above I'll be very surprised
How are u going to train in a fasted state u will burn out
I’ve been fasting since the last time I ate.
so 1 hour?
😅@@tankthearc9875
I ate last time when fasting has been eating since
the only time I don't fast, I slow
I've been fasting since I was 19 & read the book, Fasting The Ultimate Diet, by Allan Cott. Now I'm 60 & people say I look 40! Amen
Im doing omad can I ask which fasting you are doing
@@victorguani8799 I also do OMAD now. Plus, I try to get in a 3 day fast every month or 2 for anti-aging & to regenerate the immune system (according to research done by Dr. Valter Longo). In the past I did more long fasts, like up to a week, but I'm happy with OMAD & a 3 day fast when I feel like it
@@amberdawn1244 thanks
@@amberdawn1244 You do OMAD too? What time do you eat your meal?
@@carina9629 Lately I've been eating my daily feast at 2am. I'm a night person... I'm "not normal" if you talk to my family lol
I started fasting just under a year ago. I primarily do ADF and go 36 hours before I eat for roughly 6-12 hours. I was 307 lbs when I started fasting and walking and I’m now between 195-205 depending on the day. I’ve started adding kettlebell workouts 3-4 days a week and I’ve seen a huge increase in my lean mass. Dr. Fung is the main reason I started fasting. Thank you.
On your up day do you just eat until satisfied? Do you track calories? I'm having issues trying to figure out how much to eat on up day
Way to go 💪👏👏👏👏👏
@@doracarry-on5453 thank you!
Thank you for sharing!
And congratulations!!
I lost 70lbs doing exactly what you are saying. Once I added resistance training while fasting I put on lean muscle and it completely changed my physique. One of the best decisions I've ever made!
This is about where I am now. Weight from 239 to 170 through fasting and LCHF with minimal processed foods. Although I am still overweight, I'm concerned about losing too much without having built up muscle. And also, losing so much that I one day become underweight. So, I've started with light weights at home. Any advice?
and then you woke up.
@@ivoivic2448insecure incel who’s miserable with his personal life spotted
@@101elelkyhaving a hard time shitting out that sticky brick? I believe in you, just more minutes. nice projection though.
@@ivoivic2448 only a miserable person would come here to say something like your first comment… suffer by yourself man. Everyone else here is making changes for the better…
We need a Jason Fung in every doctor’s office in America.
Nk money in cures
With Intermittent fasting and low carb high protein and average fat, more veg moderate nuts and fruits, eating more whole real food, avoiding junk and with Cardio and resistance training I lost 7 kg in one month and the best shape ..... I'm now in the best shape of my life, I'm 33 Yr and I've studied pharmacy and public health...
Dr Fung is the most revolutionary man in the field of health and nutrition... The amount of nutrition knowledge I learnt in last one month is far better then my 10 yrs professional education
to lose that much in a short period is unhealthy. fake doctors on the internet man...
Dayum! That one-armed chin up casual flex by Dr Fung at 0:26. Dr Fung is flexing not only his intellectual strength but his physical strength as well! Respect!
He is quite jacked
Being jacked does bring credibility in the fitness and nurtrition space, especially among the bodybuilding bro community where I'm seeing a lot of attacks. Might as well, being jacked is a social asset and is pretty easy to manage (its just the consistency that's hard.) He has the equipment, that's the hardest part.
Where was the one arm chin up? He used both arms to pull up his body.
@@halftruths603 oh ok.. i watched it again..and yeaa.. nice trick..haha
@@zulkefleeabdullah6068 It is the in-between progression of going from a two handed pull-up, to a one handed. It is much harder than a two handed pull-up, very impressive.
Been intermittently fasting, nutritious food and exercising for a period. Lost 25Ibs, now with 6-pack. I’m almost 67 years old, with the build - so I am repeatedly told - of a fit man in his mid-20s. Went through a phase in my 40s-60s when I was much, much heavier, and unhealthy.
It’s all about the Holy Trinity:
1. FASTING
2. DIET (eating green leafy and cruciferous vegetables, oily fish, avocado, raw nuts etc)
3. EXERCISE - especially resistance training.
Get that into a daily routine and you will look better, feel better and most important of all be healthier. Never too late to start!
There’s only _one_ Holy Trinity-God, Jesus and the Holy Spirit. 🕊️ ❤
He clarified in one video what dozens of fitness gurus have danced around conflicting “conclusions” about. 25 and have been intermittent fasting since I was 18/19. Perfect example of the difference between expertise and education.
Yeah I can't wait for all the debunking videos by people who never tried fasting.
Can you drop a link please
Thanks for posting this.
It's important to note that Terry Crews has said he does 16:8 and works out in the morning. He then continues fasting after his workout until 2pm. This means that his body is still pumping out HGH while his muscles are recovering.
I'd be interested in hearing more about the studies behind this.
You might be interested in LeanGains by Martin Berkhan. Big fan of IF and quotes a lot of relevant studies on fasted training and different fasting + exercise protocols.
If you think that TC is natural then i got a great investment opportunity for you....
@@FalaqX hahaha
Ocean Front Property in Arizona
You forgot he also Tren hard.
I water fasted for 18 days and almost immediately was back to lifting the same weight as before the fast so I don’t think I lost muscle 💪🏼
BS
@@jaywilson683let me know how it goes after you do it big guy
@@jaywilson683 🤣🤣
Keep preaching!!! My life is completely different because of fasting!
So what?....
@@davothegreat9990sssssshhh, it's the new fad, let the kids play.
@@ivoivic2448fasting has been around for centuries
how much do you fast ?
@@ivoivic2448 Your idea that fasting is either new or a fad is mistaken.
Very true! I did intermittent fasting everyday for the last 3 years and I gain lots of muscles and lost fat and at 44 years I m in the best shape of my life thanks to training fasted , thank you for your information really appreciate
What time did you train?
@@antonyoneil294 I train early morning around 5:30, 6
@Robin Sailo I personally training fasted I couldn't even think to eat before working out
@Robin Sailo Not in my case, I guess I m use to it and the body is forced to use your own fat as energy this it sounds very good to me.
This did not work for me. I got very limited muscle grow even when being a newbie. I started adding a little bit of sugars or carbs before workout and I grew in one month all I did not grow in 6 previous months. I think it has something to do with cortisol levels or something.
How perfect! I’m starting ADF with weight training. A beautiful friend who’s been weight lifting for years says that fasting and lifting don’t really go together, that lifting requires eating throughout every day to stay fueled and feed muscle growth.
But I knew I could make it work, get all the benefits of fasting AND lose weight and build muscle. As long as I keep my feeding days high-protein and nutritionally dense. Appreciating this video and the comments.
This doctor I think was talking about NOT loosing muscle, not about gaining muscle. We have fuel in our body for about 1 day as glycogen. But when fasting where we get protein which we need all the time for blood for example?!
I think we need to eat protein every day for just not to lose muscle.
@@SuperMrAndersen Dr. Fung noted that patients *gained* muscle while fasting. I know that I have. I've been doing mostly alternate day fasting for the past 7 montns, and am doing more exercises, more reps, and using heavier weights.
Hi Dr. Fung! So proud to be a small part of all the healing and good you bring to the world.
Our bodies are wise! They aren’t going to loose muscle in long fasts or our ancestors would not have been successful hunters and we wouldn’t be here.
@bnza10 you bring a lot to the table. You should comment more often.
@bnza10 oh no, definitely not!! You’re wit, intelligence, and intellect, are all so refreshing!! Also, please be sure to procreate! Amongst a super, duper, crazy world, we need more people like you!! 😉
Like an old married couple :D
I didn't think it was possible for me to love Dr. Fung more, but here I am! Wow!!
This message is so important. The first fasting I did was over 30 years ago but I stopped doing it because I was so afraid I would lose muscle! How I wish that I had know then what I do now, I would have been ripped that whole time.
I think most guys with abs starve themselves like this just dont admit it .
Can you please elaborate your knowledge
I think it’s down to individual. Because I lost fair amount of muscle when fasting
You won't lose any unless you do very long fasts. @@KingKikikoi
@@KingKikikoiBut did you actually continue to incorporate working out heavy etc while fasting?
I proved this is true for myself. I did my first 7-day water fast recently, at a point where my lifts were at their peak (bench, military press, lat pulls, etc). I lost 12 pounds during the fast. The first few days after the fast, I felt weak, of course, but within a week, I was right back at the same weights I was lifting and still about 7 pounds less bodyweight.
Hi. You wrote ~ "The first few days after the fast, I felt weak, of course" ~ why 'of course'? Can you explain why this was expected? Thanks
@@davidshillito I didn't eat anything for 7 days. It's pretty stressful on a body. At least that's my experience. If you don't feel any different after a 7-day fast, I envy you.
@@davidshillito cuz usually the first few days your body still expects food sources ... but after that period of time , it will be dependent on your body fat 100%
@@Ldenlord it goes for muscle first, bodyfat will always go last because it's more of a necessity to live.
Studies are great, but most of the time they don't play out in real life. And fasting is the fastest way to loose muscle. Point blank period.
It's got a ton of health benifits, but it's the absolute worst thing you can do if you want to build or maintain muscle mass.
Intermittent fasting is much more doable, but still not ideal if building or maintaining muscle is a goal
@@smont4335 if that’s really how the body works we’d extinct the long ago ... imagine we wouldn’t be able to hunt for food for long period of time , and losing all that muscle how tf do we have to strength to hunt for more food when animals are finally available ???? Our body store fat for this SOLE reason , to use it for fuel when we can’t eat ... imagine you save up all those woods but then chop down and burn your house just for fire in the winters , that’s how stupid your argument sounds
🎯 Key Takeaways for quick navigation:
01:10 🏋️♂️ *Muscle growth or shrinkage depends on stress applied, not solely on diet. Adequate nutrition prevents using muscle for fuel unless body fat percentage is extremely low.*
02:20 📊 *Alternate daily fasting did not decrease lean mass (including muscle); in fact, it potentially increased it, compared to fat loss.*
03:42 🔄 *Fasting strategies were more effective at preserving lean mass (muscle) compared to chronic calorie restriction, with a 4x better result in lean mass preservation.*
04:09 ⚖️ *Growth hormone plays a crucial role in lean tissue maintenance. Fasting increases growth hormone, preserving lean muscle while promoting fat loss, without causing side effects like injected growth hormone.*
06:29 🍲 *Fasting utilizes glucose and fat stores for energy, not protein. Body doesn't use muscle for fuel if other energy sources are available.*
07:09 🕒 *Terry Crews practices a 16-hour daily fast, followed by an 8-hour eating window. Exercising in a fasted state can increase training intensity and recovery due to hormonal changes.*
08:04 🌟 *Training in a fasted state, as done by Terry Crews and other celebrities, offers benefits such as heightened training ability, faster recovery, and anti-aging benefits without significant side effects.*
Thank you! 🔥
Thanks 🙏🏻
Thank you for your great help.
Thank you Dr Fung this videos are so precious,I am 73 and doing every day 14 -17 hours fasting since last august and lost 12 kg also stop eating bread and doing weight training,use to be a binge eater 😊❤
I have 46 years old...i did fasting 45 hs just without thinking of it. My energy level was up to the top but i was afraid to go to the gym. I tried do some push up and did it 30 without any issues...Now you are giving me a new aspect. Thanks a lot! Regards from Argentina
I've been intermittent fasting for a while now, but want to try a longer fast to lose weight. I'm glad to know I don't need to worry about muscle loss 😃
You should make 16:8 it is better intermittent fasting with the P:E diet for the best building muscle 💪 you will see
I gained 8 kg of muscle mass working out (weight lifting) fasted and eating twice a day. I eat no carbs only those coming from veggies.
did you working out before?
You deserve an award. You're an amazing doctor. 🙂
It’s fun to watch him now, he’s loosening up and more relax!
I was gonna say the same thing! Yay!
Great content. "Storing up firewood for the winter and then as soon as it gets cold to chop up your sofa and throw that into the fire". Great analogy. BARZ!!!!! Thanks
I’m looking forward to another book. Maybe another “code” based book, like “The Fitness Code”. Keep up the good work and thank you for expanding my understanding.
The Vaccine Code
@@GK-zr9cq ooooooooh yeah! You are on to something.
I rather listen to Jason than to most fitness experts who say you shouldn't train fasted and you'll lose muscle. It makes sense that the body will preserve muscle as it has other sources of energy to use for function during times of not eating
I'm about to turn 34 and had done intermittent fasting maybe around 15 years ago... I liked it then but never knew HOW it worked or WHY. After a 7 year hiatus from fitness and I.F, I started the gym again but this time with more research and knowledge and a plan. I've been at the gym for about 1.5 years now starting with training 2 - 3 times a week for a year and only recently 6 days a week. I have always wondered why and how I could be building muscle even though I'm not having food or protein in my anabolic window after training and now I know why. I'm almost at the best shape I've ever been in my life. I'm close to a body builders physique and I couldn't be happier so far. Thanks Jason for explaining this it finally fills in the blanks as to what I've always wondered.
Bro so no protein right because I wanted prove that you build muscles by eating just good not particular protein and all
I am impressed that nobody is talking about the kamikaze warrior impression dr. Fung performs at the beginning and end of the video, it was amazing! Was it for a dare/losing a bet or is he just that fun(g)?
Great video, one I will show to people that whine about losing muscle from fasting.
Awesome….I have been a professor teaching exercise physiology for over 30 years, and you have really opened my eyes. Thank you !!
you're a pretty shitty professor if you just now learned something new.
I started fasting every other day 2 weeks ago and have already had a drop in blood glucose and have had to tighten my bra strap around my torso 2 notches. So happy with this method. Thank you Dr. Fung!
I only listen to Dr. Jason Fung for my weight lost and my wife T2D solutions.
Thank you so much
This is the BEST EVER video on this. You convinced a biology guy to 16:8. Nothing else did i watched or read.
Your book did not shy away from scientific reasoning and was yet very easy to follow!
Becouse there is nothing scientific in it ahah
I never imagines i will ever see Dr. Fung working out. This makes me smile. seriously though on my 72hour.
@@shish_taouk OMG this is so me, I usually have excitement about my next meal. Today I was day dreaming of fried salmon in airfryer
@@shish_taouk I'm on day 8 of an 11 day fast--that makes it--what?--about 190 hours. Feeling good. And I used to fantasize about food all the time (even when I was eating every day). Now much less.
Dr Fung, you are the complete package. Handsome , kind, and Intelligent!😉😉😉😉😉
Damn bro, you trying to f.......?? Lol
Thank you Dr Fung.. Love all your videos, they are all very informative.. Thank you for all your efforts, stay blessed always.. God bless.
Greetings and gratitude from Ethiopia. Thank you Dr. Jason Fung
If you are doing a prolonged fast , how is your body going to repair muscle tissue when we aren’t consuming any protein ?
This is what troubles me another doctor says you shouldn’t exercise.
I knew the analogy of "storing fire wood for winter and then instead chopping-up sofa" was going to come up...LOL. Great job Dr. Fung. Thank you!
Lol 😂😂
Very, very interesting! And sad...because many of us have been given wrong information all our lives.
I just wish I'd known this years ago!
Day 7 on my 30 day pass. Muscle mass up .5 and minus 12.8 pounds of which 10 lbs is pure fat. FUNG FOREVER!
Now age 47 and have been doing CR and IF (16/8) for around 6 months and working out fasted 3 mornings per week. Put on roughly 10-15 pounds, not around my belly. Was kinda surprised that I put on that much muscle mass while eating less then I used to.
I was sceptical, but I thought I had nothing to loose, tried "everything" else.. Been doing intermittent fasting and OMAD for the first time. Lost 30lbs in 28 days, and I feel great.
At carl. I have been fasting and low carb and sugar. The fasting is not bad but the brain fog gets me. Did you have brain fog and what did you you fix it ? Thanks
@@tulio3571 brain fog comes from the low carbs . but if you do it long enough it will pass because your body will adapt to use keytones . but you dont have to fast and do low carb but it helps
@@frolianmoreno7297 thank you.
@@tulio3571 I didn't experience any fogging after I started fasting. A little light headed, but besides that more clarity during fasting then before.
@@carlgeorgtsigakis498 did u get frail and lose ur muscles !?!? Please reply bro I've never been in shape in my life im so close il do anything at this point
Short answer yes but that's bc your body does so in general. If you take care of your self even when fasting, you can gain muscle. Lift!
Thank you Jason . Considering so many fasting videos off late , the reason I love your videos is hard core scientific evidence and it’s critical appraisal . Being a doctor myself into academics I always wonder only few people get the hard facts from a published paper . You make it easy for general audience too … that’s your one of X factor as well .
Tremendous job and contribution to the society !! Keep going with all love and support …
Always rewatching this video to keep me motivated before I start my 40 hour fast 😂 almost 5 years fasting now 🙏🏽
He always has great materal. Iwatch him and dr. Berg as well as dr. Gillaspy. Dr. Fung has a nice sense of humor which is welcomed compared to some. I am day 9 of an extended fast. Early Feb i weighed in at 203 and this week I weighted in at 179.1 .... the journey continues as I learn to say bye to all forms of refined sugars.
How are you now? I also started losing weight in February but only discovered keto/IF in mid may.
I was at 213 and i am now 180.2.
Did you hit any plateaus along the way?
I Thank you man, you are funny too. I was able my lower my blood sugars from 16 to 5 in one week. that was in January 2021.will keep at it and keep everyone posted too.
Wish I could hit that like button more times just for the ending!
Thanks Jason. That was reassuring. I need to fast for at least 40 hours each week (ie a full day and a night) as well as OMAD the other days. I thought I was doing OK and now you have confirmed it. I have nothing to worry about.
I have Weight training 5 to 6 times per week mostly before "Breaking FAST" each morning.
In addition to my 16-8 Intermittent FASTING, I also include Prolonged Water Fasting (>36hrs) every 4 to 6 weeks.
At the very end of those Prolonged Water FASTING, I usually take two Challenges which are Weighted Chin Up & Weighted Rings Dips.
I've never got disappointed, cause I make my New personal Best every time with so-called empty stomach - in fact I'm not that hungry even though I have no food for 36+ hours.
I am doing fasted cross country skiing. Recently did 15km fasted no problem whatsoever. I lost 4kg and and I am the leanest I have been in years. HbA1C is 5% and aiming for sub 5% in a month.
Yep started fasting and lost 40lbs then, started a weight lifting regiment gaining 10lbs of muscle. Feel like I’m in better shape then I was at 30.
How long did putting on 10lbs of muscles take?
@@sokingssddk probably 3 months
Good for you, Bradly! I have lost over 80 lbs in the past 7 months, while gaining muscle.
@@bbradley280
How old are you? Age is a _huge_ factor when it comes to regaining muscle.
My praise for Dr. Fung is basically limitless.
i do fasting alot and i feel really better than before
I do OMAD and lift 4 days a week with cardio mixed in. It’s worked for me.
It is just great.. i have lost 16 kg in 16 weeks thanks to you Jason.. my family was worried that i might be losing muscle but this removes all doubts.. i have reversed 5 years of my age in less than 5 months.. and feel a lot fitter.. on top, i can eat anything i want without worrying about calories.. thanks a lot Jason for changing so many lives.. only my tummy remains and guess i need to start exercising soon
This is the best explanation of fasting and building muscle I’ve ever heard
I feel excellent when I fast and see great weight loss results. Thankyou Doctor for breaking this down for everyone. Great information
The best content on RUclips
Dr Fung has those guns who would have known 👀
I was impressed!
Hi Jason, I love your fasting education. I am 69 years old and really find your sessions beneficial. Eric in Vancouver, Canada
I have three of your books (I have no diabetes but was interested in reading your book on that before I gifted it to a diabetic friend). Over the past 3 years and mostly due to YOUR very clear but detailed information, I have lost the 17 kilos I had too much of and was insulin resistant. I am definitely keto and fast daily, either 16/8, 22 or 24 hours and feel so much healthier and better for it. Thank you for your work and glad to see you more on RUclips!
0:25 Love the inspiration of the one handed pull-up.
Dr. Fung looks younger every video! Fasting (safely) is amazing :)
Dr. Fung is in his 50s--few would guess this.
Wow he looks great!!
This video provides an insightful explanation backed by scientific studies, debunking common myths about fasting and muscle loss. It's truly eye-opening to understand how fasting can actually preserve lean muscle mass and offer various health benefits. The presenter's clear explanation and evidence-based approach are highly appreciated. Many thanks for sharing this valuable information!
This makes sense.
I have type 1 diabetes and my bg increase while fasting.Time to increase lantus dose
The 2 studies you quoted. First study was targeting obese participants, which may not apply to patients who are lighter, as the health benefits of weight loss in obese patients are likely to be far higher. Second study actually showed that there is a loss of lean mass even in the fasting group, which contradicts your message saying fasting doesn't cause muscle mass loss.
Fung always targets obeses. Obeses are in protein sparing mode anyway, let's not fall for this trap. I.F. will burn your muscles if you don' take care.
I've seen so many Dr. Fung videos that I must have heard the sofa analogy a hundred times.
If you've been storing up sofa analogies all this time would you suddenly chop it up and throw it on the fire and use an icebox analogy instead? No, of course not!
Finally. The real explanation to the whole thing. You are the best Dr. Fung
I have done 7-day water fast 3 times and had great results. I struggled badly with headaches the first 2 times. The third time, I ate once a day (higher fat and minimal carbs from vegetables only) for 5 days prior to my 7-day water fast. I had no headaches, and the difficult first 3 days were not as much of a grind to get through. I think everyone should try a 7-day fast once in there life time to gain control over your mind. I am more patient (no snaking throughout the day) about food, and try to minimize the quick (unhealthy) food options. I now intermittent fast where I eat in a 2 hr window daily. If I have a social reason to indulge over the weekend, I will fast for 48 hrs prior to or after the indulgence. Then, go right back into my routine.
Interesting input. I had never considered a 7 day fast. The most I could do was 3 days. lol
Right now I am on day 9 of an 11 day fast (I usually just fast every other day). Day 3 on has especially been really easy.
Jason i now want a 10 min workout video from you after seeing that legendary pull up 😆
WRONG [00:26]
··· CHINUP ::: one word ::: upgrip [supinate grip]
··· PULLUP ::: one word ::: downgrip [pronate grip]
··· sundry singles ::: situp, pushup, deadlift, etcetera
BUDAPEST
2021 FEBRUARY 16
8.3 AM
@@merdiste vai se fuder
@@litt_000 🤣🤣
I'm 40 years old... and I have been living with food addiction my whole life. I couldn't stay hungry as I would get wind/gas trapped in my back which would cause me severe pain. I've been living with this problem since I was around 18 to 20 years old. This led me to food addiction. My whole life, I've been eating a heavy meal every 3 hours. If I'm awake till late, I would eat at night as well. Sweetcakes were my best friends. I would be eating cakes between my meals. And also, my aunt got an ulcer and I was told it was because she wasn't eating on time. A lot of more people had got some medical issues which they said was due to not eating on time.
So, this back pain, the fright of ulcer(and probably other unknown medical issues), and the ghrelin hormone were the reasons that I always thought fasting would be dangerous. Maybe 2 times, I tried 16:8 intermittent fasting, but it turned out, I would eat a lot in my eating window and would still gain weight.
But thanks mainly to Dr Fung followed by Dr Berg, I dared to try 4 days of fasting a few weeks ago. I consumed a lot of hot water, one multi-vitamin tablet per day, medicine for my gas accumulation in my back, and a cup of coffee with milk per day.
This experience has changed my life. I still keep my medicine for trapped gas, but I feel I need it lesser, the more I get my stomach used to fasting.
I can eat one meal per day, and I feel fine. And I'm losing weight. I will have to do at least 3-day fasting from time to time so that I don't get back to my food addiction. But so far, even if I think of cakes, when I eat them, I cannot enjoy them because my internal system has changed.
I now can enjoy eating cucumber and oranges with salt. Before, these weren't considered as food to me. I still consume fast food frequently, and I'm still losing weight. Because I don't eat frequently...(If that makes sense)
What is your "trapped back gas" medication?...
@@michaelmatthews2126 My favorite is 'Gastrogel'. But since this is not available on the market, for the time being, I'm taking 'Gastrolex'.
I've used 'Gaviscon' and 'Mallox' as well.
Impressed to see him do one arm pull ups.
everybody can do that like he did - just try yourself
@@canna-spot how someone that couldn't even do 2 arms pull up do that?
That’s basically a normal pull-up guys
@@canna-spot I can only do 3 pull ups using both arms. Thought it was easy 2 months ago. Excruciatingly hard.
@@canna-spot I definitely cannot do that.
Thank you so much Doctor. Oh how I wish more were like you. You are an absolute gift.
Genuinely important to prioritise protein and resistance training if you do fasting for any length of time. Difficult for the body to absorb enough in a smaller window, just need to be mindful.
The body isn’t dumb and it’s not difficult.
@@truthprevails4386 the body isn’t a super computer and it’s not easy to get enough protein when you eat very infrequently.
I just finished Dry fasting (No food+water) 24h + 48h of water fasting (no food)
Lost 3kg in 3 days even tho it wasn't even a goal in the whole fasting. The body was doing great on day 0, and whole day 1 and two. The third one was a bit rough.
Didn't lose any muscles during
Woooow
this is water drop, nothing more
@@fittaku impossible, you have no more water to loose
Just done 40 hours of dry fasting
I thought a dry fast with no water was dangerous, your organs can't function without water
Thankyou !! I am weight lifter and never known this strategy!! I am starting now to see if it works.
That opening, I wasn't expecting it and choaked on my water lmao
Love you and I have the up most respect for you Dr. Fung, thank you for sharing your knowledge with us. I fast everyday 16:8 and I love it.
Been doing intermittent fasting for about 10 years now and still gaining strength and muscle every workout.
No problem at all and it’s fasting that finally gave me visible abs.
Edit: And I’m 40 years old but look like I’m in my twenties.
How Is your fasting and training schedule?
You to small to say you muscle keep grow. It’s not
I have around 30 lbs of fat that I want to get rid of, mostly belly fat. I recently started fasting 40-48-hours once a month, but I am going to change it to weekly. This video answered my question about maintaining my muscle, since I do weights a minimum of three times a week. I'm going to do more workout during fasting as well.
What great information! Thank you Dr. Fung for sharing the vid!
I dont know if you will see this or no but i wanted to say that you are amazing
Listening to this gem during Ramadan
How did you go about it, through Ramadan without losing muscle
@@elmadomollo782 Most Muslims *gain weight* during Ramadan, feasting before dawn and after sunset. The fast is only during daylight hours.
Thank you doctor for easy, simple and straight forward answer to the burning question in the bodybuilding community.
I learn a lot about bodybuilding also from this video of yours, that was really great.
You just reduced the 300-600 pages of bodybuilding books on how to build a muscle to 2 spoken sentences. That's really incredible. Thank you again.
This video of yours is not just on query of fasting and muscle loss, it is about building lean mass, getting bigger in healthy manner and lot more about staying fit and health.
Thank you doctor for all your efforts to make complicated topic easy and simple but at the same time profound. 🙏👍
thank you so much Doc Jason Fung you save my life God bless
One of the best videos so far!!! Thanks dr fung
Fasting brought me back to 28 YO when I was looking like 45 YO actually I’m almost 40 and doing IF now 3 years. I thought I lost muscle too but the truth that was only fat around muscles
Love this...however if a person fasts and then goes for a long run, the body cannot convert fat fast enough to create energy. That is why runners hit the wall when glycogen is depleated.
Thank you Dr. Fung for sharing the information!
I'm on day five of a fast. Loving it!!
Thank you dr Fung, great content. I really look forward to watching your videos each week. Take care of you, too. LG
Great thanks Dr Fung, I’ve been wondering about this and once again you provided evidence. You are the MAN!
Great Video Jason!
I’m finding great muscle building amd fat loss with fasting from 2pm then training fasted at 6:30am the next morning then able to lower cortisol by eating pretty much after training .....till 2pm....I’ve also read studies where this works in better with the circadian rythm as you’re consuming most calories in the day earlier then fasting evening / night the way our bodies are designed , with restorative/ repair processes occuring at night in the absence of insulin .....my sleep has been much deeper and better quality since doing this too ......once a week I will have a carb only meal at around 5 or 6 to restore glycogen for training and the benefit is also serotonin for sleep , but I don’t eat anything after sunset and I’m finding it so much better in many ways !
The body use amino acid from muscles when you re fasting during neoglucogenosis, that's a fact. Glucose produce is used by glucose dependent organs such as brain. Thus, during fasting you use your glucose stock and fat stock, until a certain level of deprivation. Then your recycle your muscles.
I am majorly impressed. 💪🏾