I would also assume that since the only oxygen and nitrogen your tissues can absorb come from the air still in your lungs when you dive, it's less of an issue. You're not adding nearly as much nitrogen as you would if you were constantly breathing it in from a scuba tank, so it's harder for your tissues to become saturated. Overall, you're not really adding that much more nitrogen to your tissues just from the one breath, so there's not as much that can bubble out.
I’m not an expert, but I agree 100% with @NightshadeReaper66 on this. The physical parameters, including the partial pressure of nitrogen, are just completely different between Scuba diving and freediving.
Ohhh that makes a lot of sense. I knew free divers can't really get the bends, at least not nearly to the degree of scuba divers. And I also knew it wasn't just because of the short dive time, which is what this video implies.
@wj2036 there was some cases of freedivers who got bends but while using underwater scooters with repetitive dives without rest to great depths that usually pros only do once a day or once a week.
As a diver that has dove 110 feet the main ways this happens is when you dive. lets say you dive 66 feet (this is just so no confusion happens) your air tank (NOT Oxygen. Air tanks are not 100% o2) Is compressed somewhere like 3,000 psi I have not dove in a while so it might higher but when you dive that air will compress so at 2 bar it will take two times the normal amount to fill up your lungs. Now that nitrogen will make its way in your tissue the longer your under pressure (the more pressing the faster it is) when you rise two things will happen if you hold your breath the air in your lungs will expand to what the depth it is if you rise to far without letting out the air your lungs will umm pop like a balloon. Second it does not matter how far down you are you could be 100 feet under water but once you hit the depth and come back up quickly you should be fine. However if you stay at depth and rise quickly then you can get the bends. It is not how fast you rise it how long your underwater and then how fast you rise. The golden rule to scuba diving is never hold your breath. If we don’t have our mouthpiece or regulator then we slowly blow out our mouths. Hope that helped sorry if it was long I got carried away. Edit I forgot to mention because free divers only take a breath from the surface and not from depth it’s extremely hard to get the bends because the air they have is equal to the pressure at the surface. The only way to stop the bends is to recompense your body to the depth you were at and slowly release the pressure it’s done in a decompression chamber. Also free divers cannot experience the lung things
exactly I've been to Nepal and people there who are professional diver just either dive shirtless in water you can't even see and some have homemade breathing tank I was very scared when I saw him use that I just thanked lord that bro came back 😂
@@xyoohorrordevilbg4566indonesian got the mermaid tribe lol. Alll they use was googles.theyre basically navy seals level of free dive.try go 10mtr for 5 min no tank etc
So they left out something super important. When you’re scuba diving, you’re not breathing the same air as what’s on the surface. You’re normally breathing some type of mix and the longer you spend underwater you’re becoming more and more ‘saturated’. The same expansion they explain happens and you’re breathing it, because you simply have way more nitrogen in your body you have to be a lot slower on your ascent to give everything the proper time and opportunity to shrink again as you rise back to surface level. What makes this kind of diving unique is the fact that they’re functioning on ONE long extended breath hold that’s also paired with a ton of was called lung packing where they just sort of tuck every last bit of air they can into their system. Since all of their air is already inside of their body while they’re traveling down and back up to the surface they have significantly less to be concerned about as far as decompression sickness aka the bends. Their biggest concern is simply making sure they don’t get too cocky with their air supply or trying to dive TOO MUCH too frequently. If their bodies fail them and they don’t have some sort of rocket to get them to the surface that’s normally going to mean they drown.
@@autumnfragrance6326 Nitrox is NOT used for deep dives as maximum operating depth of Nitrox is actually lower than air due to Oxygen toxicity. You probably meant Trimix, which often has less Oxygen than .21 and replaces part of Nitrogen with Helium.
Yes it does. When u come back up, the pressure decreases and so does the partial pressure of oxygen in your blood. Ascending too quickly can prompt your body to shut down due to hypoxia in your brain. This is less relevant in diving, but quite frequent in competitive free diving.
@edouarddrouin4519 no. This has *nothing* to do with the speed of the ascent. Either way, slow or fast ascent, the partial pressure of Oxygen is going to decrease regardless, as the volume in your lungs expands again. This cannot be avoided. Purposely slowing your ascent might actually make you consume even more Oxygen on the way up, increasing the chances of a blackout even further. Source: I'm a genius
no you cant its not how it works only aplys the scuba not free diving a shallow blackout in frediving is causd by pushing the limits way to much you only breath the air on the surface not the compressed air thtas in a tank at depth
@@EnlightenedByKnowledge there is, but that is different. In scuba diving over about 30m of depth (4 atms of pressure), the nitrogen starts to become slightly narcotic. Hence can lead to poor decision making. Sometimes it is compared to feeling drunk
@@emilyscloset2648not just the nitrogen, oxygen is also narcotic. that’s why technical divers use trimix which also contains non-narcotic helium in greater depths.
also when freediving, the only air in your lungs equates to a safe breath on surface, but if you take in any air at depth(from a tank or umbilical), you need to exhale it as you ascend or it will expand and rupture your lungs
you should try it if you ever get the opportunity. it takes minimal practice to dive 20 feet. I know its not for everyone but hey, I used to not like the ocean and now I want to live on a boat so you never know
By henry's law, pressure increase solubility of gases in liquids. So, when you get back up on the surface the other gases dissolved in your blood come to gaseous state creating various problems. This is known as 'Bends' or commonly as 'Decompression Sickness'.
As a scuba diver who certified at 11,i had a lot to learn, and it was HARD. But 3 most important rules are:breathe bubblea if you air goes away, 2:DONT hold your air, 3:at 5 meter stop, when youre coming up stop a t 5 meters(4, 8 m - 5,2 meters)
As far as I know: Freedivers also just circulate the air inside their lungs/body instead of breathing in nitrogen air underwater. Meaning the gas don't really build up in the first place.
The scuba regulator provides air to you at 1atm relative to the surrounding pressure. When under 4atm of pressure the air of the scuba diver’s lungs are at 4atm and have maintained the same volume of air. The air in the freediver’s lungs has also compressed to 4atm but the volume has decreased to just 1/4 of the size at the surface. Making a breath hold safe.
I was once in a diving group and one of them got type 1 decompression sickness while scuba diving, because he had only little experience. Could have been much worse but everyone reacted quickly. He luckily recovered pretty fast.
Great diving advice. I have been diving for a couple of years and I’ve never heard such a good explanation of the bends- most people will tell you” “no go up fast very bad 😤” and they won’t explain.
and if you get to a certain depth, safety stops or decompression stops on your way up become VITAL. safety stops can take 3-5 min, decompression stops several hours. and they cannot be skipped if you want to live.
I remembered a scuba diver who ran out of oxygen(or he panicked, can't recall), so he came back fast without making decompression stops. As soon as he hit the surface, he started screaming with pain & died immediately.
Depends on how long his dive was, the „died immediately“ is very unlikely and/or incredibly unlucky which would usually only happen if he had a gas induced stroke or sth. Usually you may be in pain (bends) and look forward to some days/visits in the pressure chamber. But otherwise for sports divers no critical damage. Tec divers on the other hand usually are trained enough to not just run out of air that easily.
@@MetallicReg Unfortunately it happens every year. Some people just forget to account for their SAC rate being different in different temperatures and that can easily balloon into problems at depth.
I’d make a guess that he held his breath on the way up, something that you absolutely never do when scuba diving. Due to Boyle’s law (and taking on compressed air at depth) the air in his lungs could’ve expanded rapidly, leading to over expansion injuries. (Air in the blood, brain, Etc) It’s common for divers to do this in a panic situation, especially running out of air. Sad, it’s a preventable accident Could also be decompression sickness, but that doesn’t typically cause death.
When they mentioned Scuba diving, this is called the bends (or properly, decompression sickness) and is extremely difficult to cure once it occurs. If a person experiences the bends secerely, they must be brought to a decompression chamber, which there are very few of, in order to recover. The worst cases include neurological issues, paralysis, and fatality. For example, British Melanie Stoddart was on a trip in the Maldives, and, during her scuba dive, she experienced the bends. She unfortunately passed as it took 9 hours to reach a decompression chamber. I hope this gives some people an insight to the dangers of scuba diving. If any of this is wrong (which is highly likely considering I wrote this off of memory) plesse let me know.
Actually it’s with any air that this can happen, just more common with Scuba divers, because of the equipment being heavy, plus getting themselves out of the water with said equipment.
@@Zaniya3I've seen competitive free diving and they don't do stops like scuba divers do. They go down and come straight back up sometimes using lifts with airbags. I don't see how this is possible if they really have to worry about decompression sickness.
@@kyu.misaki7677It's probably because free divers don't have tanks with them. They're not intaking more air than they already did on the surface, therefore their tissues can't become saturated with more oxygen than they started with. Because of that there's less risk of decompression sickness as there's less oxygen in their bodies to decompress.
Yo, that’s really cool. I kinda wanna try it one day but I can’t, I had this thing “Heart murmur” that doesn’t lemme do that but now it’s gone, it’s just that “Don’t do things if you had a pre-existing condition” but these vids are nice.
With scuba, you add air while absorbing what's already inside you, with free diving (holding your breath), there's no extra air to cause any issue..plus the whole part where you cant really stay down there anywhere near as long.
⚠️ If you Inhale air underwater at depth (from a scuba tank or whatever) Exhale as you rise; if you hold your breath from a deep depth and rise quickly without exhaling, the pressure, compressing the gas in your lungs will lessen and the gas will expand proportionally to your ascent This can be fatal [Never hold your breath if you find yourself inhaling at depth]
This is only rlly applied for scuba diving. You stop every 20 Meters to decompress and adjust your body to the new pressure, and swap air tank so you breathe the correct air mixture. The deeper you go the less time you get to stay down there as the air in your tanks get compressed more and more the deeper you go and therefore you use more of the air mixture.
This is why you exhale on your way up... My time in Seal training there was a statement we paid attention to. "Too deep, too long, too bad." Best option is to be tied in tight to emergency decompression entities involved with the major scuba diving certifiers.
I saw an episode in 1000 ways to die about a girl laying in decompression chamber after her scuba session. After a while, a worker went to her door, didn't notice she was there, and turned the latch slightly so some air can get in. Realizing what he has done, she ran to the door screaming and pounding, but it was too late. She exploded like a can of soda that's been shaken.
A man spend multiple hours in an underwater cave, he saw one of his friends die, later on another one of his friend died close to the cave exit, he checked his live system meter (a gadget) and it said he must stay 7 Hours underwater, in order to get up safely. 2 more of his friends got lost He was all alone in the pitch darkness while his friends body was blocking the way out, he used all his remaining strength to push the body away, he got up even tho he knew he Will get decompression sickness on the surface, after he Made it through he realised that the water frozed because he spent more time than expected underwater and didnt get out in time, he pulled off his gear and smashed it over and over onto the ice. After some time it broke and after 12 hours underwater he breathed air for the first time, but he realised his remaining friends is still underwater (he thought) but he saw his cars light turned on "did someone Made it" he thought he tried to see and one of his friends Made it, they called 911 and got treated in the hospital, (one of them died)
There is however something called “shallow water blackout”! Basically as your veins decompress, your body can pull less oxygen from your bloodstream which can cause you to pass out. A really famous surfer from where I live died blacking out while freediving.
I am a nursing student, the name of the thing about getting air in your bloodstream is called air embolism, it is really dangerous, thank you for this insightful video and be safe out there
There are measures to avoid the dissolvement of nitrogen!! In long time deep diving, the cylinders are filled with mixtures of helium nitrogen abd oxygen!! It prevents the occurence of amnesia
The only air a free diver has to expand in them is air that was already there, even less if you exhale. Even if it expands all the way, it will only be back to how it was. When scuba diving, you're adding more and more air. If it fully expands, all the soft cavities in your body (especially ears, sinuses, and lungs) risk damage or rupture.
Don't dive if you have nasal congestion. I made that mistake and am now suffering from sinus barotrauma. I went through extremely painful two weeks. Thankfully im almost healed.
I have been 150' in Lake Champlain. Cold and dark. 100 cubic foot tank. Plenty of air to decompress. Too cold to stay down long. I always thought if your not breathing compressed air you didn't have to worry about getting bent. Was I wrong?
There have been a few instances where free divers have died from a ruptured lung while ascending quickly. Air caught in one part of the lung expanding without being able to spread evenly into the rest of the lung. If you do deep dives, get an X-ray first to check that you don't have damaged lungs!
Correction about misinformations: Your body is not a steel cilinder that can handle enourmous amount of pressure from gas. If you are not ingesting any air underwater you are not increasing your gas-volume once you surface > you are safe. If you are just 5 meters below the surface and breath in some air you will create “gas volume surplus” (you start to store more gas in your body than it can safely hold in higher elevations) As such you can dive for infinite amount of time in infinite debt before the gas from the breath on the surface can do any harm to you. The gas surplus can result in your blood turning fizzy with bubles if you do not reduce it. The lower you go more gas do you need to ingest for the same breath and more gasses are bound to your blood. This results in much higher oxidation of the body (you could last 5-120 minutes from the oxygen in your body alone), but at the same time storage of CO2 (which will kill you if you do not exchange it in your lungs with gas that can be bound to your blood instead of it, which turns the 5-120 minutes a breath joyride to do not hold your breath or you will suffer from gas surplus and high CO2 levels and die within 12 minutes pass your last breath [depending on debt, 100 meters and lower increases your gas capacity so much that examples of 30 minutes without air and living are possible with lower depts even higher records should be possible, but such pressures are impossible for scuba divers (submarines only, it should be possible to survive without oxygen supply in a submarine around 1000m bellow surface if there is active CO2 filtration for 30-200 minutes (Maibe even later but expect extreme brain damage)
wow, what a gorgeous pool! is it really 40m deep? (guessing from the lack of vis to the bottom of the cylinder in the first shots, and the Y-40 marking at the bottom). Big love to all free divers, especially those who can safely go so deep! I have run into a handful at 25m-35m out in the wild and always been amazed. That said, while I agree with the way you explain nitrogen boiling in your tissues causing the bends, what an incredibly stupid way to explain this relative to scuba diving (I'm an accredited scuba pro btw). When you free dive, you only put air in your lungs at the surface at *1atm* (or, to be more accurate, whatever the pressure is at the surface of the water you enter). With scuba, if you're down at 40m taking full breaths, those are at 5atm,,,,, If you held your breath going up, you would pop your lungs. You have 5 times as much gas in your lungs (especially nitrogen) and it will have a much larger effect penetrating your tissues and causing the bends compared to a free diver who but 1atm into their lungs. If your freediving friend came down and tapped your head and then you both went up together quickly, you would have 5x more gas boiling in your tissues. Yes the time underwater matters with any type of diving, but with free diving the risks of gas absorption are basically negligible compared to scuba. If I take a breath at the bottom of that amazing pool, with a tank full of regular air (no nitrox/trimix/etc), I need to watch my time for tissue absorption, monitoring depth and pressure for each meter I ascend
I am a scuba diver and it is also quiet hard to make it dangerous mostly because of the limiter air in your tank so you can hardly be underwater to long scuba divers van go up by a max of 18 meters per minute and you have to make a safety stop at 5 meters
I want to the pool just right now and I was swimming so much in the deep end. My stomach hurts and I can’t breathe. I wasn’t on the water by the way I was just standing up.
Nothing gets compressed. Higher pressure means higher solubility so the gasees get dissolved in your blood and as you ascend and the pressure lowers, the solubility gets lower producing bubbles in your bloodstream and/or tissues..
You're not correcting anyone bro. The gasses do get compressed. When you come back up, as they come out of solution, they also expand. This expansion causes physical damage on a microscopic level. If there was no volume change there wouldn't have been a problem.
I fell out of a tall tree when I was 5, and collapsed my lungs, unable to breath for 20 minutes or so, while no one thought to help me. I'm not a fan of chancing things like this. A little ways is ok, but you have to stop when it's your limit.
I would love to swim in a pool like that, but I'm too light, so I just float back up. I have to literally fight to get even a meter under the water. I kept failing my swimming lessons as a kid because of this, lmao
I did scuba and diving. I easily got the scuba certificates while i couldn't even get the 1st level certificate of free diving. Free diving is so hard!
@@Cotton-xs5ib because you said he was a world class spear fishermen i assumed he wouldnt be scuba diving because the standard is for spearfishers to hold their breath where you cant get the bends obviously he wasnt freediving but it still surprises me how he got decompression sickness while being such an experienced diver.
i think it’s called the bends like when the bubbles get into ur blood you get a stomach ache and a headache and you have to go to a chamber in the hospital
When scuba diving you breathe air at the same pressure that is in the water outside, while free diving you still have the same air you had when you took your breath out of the water at 1 Atm.
Used 2.0 ATA or greater pressure in a hyperbaric chamber should you run into an issue doing just that and your life is in danger. You should be OK within a few hours.
My dad who worked in the navy and is a PA (physicians assistant) taught me a trick, let out some air and only rise as fast as the bubbles do, that should be slow enough to let everything go back to normal in your body.
More (immediately) dangerous in SCUBA diving is lung overexpansion injuries, as your lungs sort of explode if you ascend while holding your breath of compressed gas - the golden rule is never hold your breath. This doesn't happen in free diving as the original breath was at surface pressure.
I had nightmares about a pool like this
Same
Same. My anxiety went up like crazy
Dude same!!!
Same
I think we all did 😭
I would also assume that since the only oxygen and nitrogen your tissues can absorb come from the air still in your lungs when you dive, it's less of an issue. You're not adding nearly as much nitrogen as you would if you were constantly breathing it in from a scuba tank, so it's harder for your tissues to become saturated.
Overall, you're not really adding that much more nitrogen to your tissues just from the one breath, so there's not as much that can bubble out.
It's not bubbles form from the already gas in your body and cause a painful situation called bends due to this
I’m not an expert, but I agree 100% with @NightshadeReaper66 on this. The physical parameters, including the partial pressure of nitrogen, are just completely different between Scuba diving and freediving.
Ohhh that makes a lot of sense. I knew free divers can't really get the bends, at least not nearly to the degree of scuba divers. And I also knew it wasn't just because of the short dive time, which is what this video implies.
@wj2036 there was some cases of freedivers who got bends but while using underwater scooters with repetitive dives without rest to great depths that usually pros only do once a day or once a week.
As a diver that has dove 110 feet the main ways this happens is when you dive. lets say you dive 66 feet (this is just so no confusion happens) your air tank (NOT Oxygen. Air tanks are not 100% o2)
Is compressed somewhere like 3,000 psi I have not dove in a while so it might higher but when you dive that air will compress so at 2 bar it will take two times the normal amount to fill up your lungs. Now that nitrogen will make its way in your tissue the longer your under pressure (the more pressing the faster it is) when you rise two things will happen if you hold your breath the air in your lungs will expand to what the depth it is if you rise to far without letting out the air your lungs will umm pop like a balloon. Second it does not matter how far down you are you could be 100 feet under water but once you hit the depth and come back up quickly you should be fine. However if you stay at depth and rise quickly then you can get the bends. It is not how fast you rise it how long your underwater and then how fast you rise. The golden rule to scuba diving is never hold your breath. If we don’t have our mouthpiece or regulator then we slowly blow out our mouths. Hope that helped sorry if it was long I got carried away. Edit I forgot to mention because free divers only take a breath from the surface and not from depth it’s extremely hard to get the bends because the air they have is equal to the pressure at the surface. The only way to stop the bends is to recompense your body to the depth you were at and slowly release the pressure it’s done in a decompression chamber. Also free divers cannot experience the lung things
As a scuba diver I rly applaud free divers diving that deep that quickly without a tank is extremely impressive
exactly I've been to Nepal and people there who are professional diver just either dive shirtless in water you can't even see and some have homemade breathing tank I was very scared when I saw him use that
I just thanked lord that bro came back 😂
@@xyoohorrordevilbg4566indonesian got the mermaid tribe lol. Alll they use was googles.theyre basically navy seals level of free dive.try go 10mtr for 5 min no tank etc
So they left out something super important. When you’re scuba diving, you’re not breathing the same air as what’s on the surface. You’re normally breathing some type of mix and the longer you spend underwater you’re becoming more and more ‘saturated’. The same expansion they explain happens and you’re breathing it, because you simply have way more nitrogen in your body you have to be a lot slower on your ascent to give everything the proper time and opportunity to shrink again as you rise back to surface level.
What makes this kind of diving unique is the fact that they’re functioning on ONE long extended breath hold that’s also paired with a ton of was called lung packing where they just sort of tuck every last bit of air they can into their system. Since all of their air is already inside of their body while they’re traveling down and back up to the surface they have significantly less to be concerned about as far as decompression sickness aka the bends.
Their biggest concern is simply making sure they don’t get too cocky with their air supply or trying to dive TOO MUCH too frequently. If their bodies fail them and they don’t have some sort of rocket to get them to the surface that’s normally going to mean they drown.
Meanwhile super deep diving mammals actually empty their lungs before they dive. They just store all the oxygen in their blood.
@@morganalabeille5004 Most tanks are fille with normal air. Nitrox is used for deep dives.
@@autumnfragrance6326 Nitrox is NOT used for deep dives as maximum operating depth of Nitrox is actually lower than air due to Oxygen toxicity. You probably meant Trimix, which often has less Oxygen than .21 and replaces part of Nitrogen with Helium.
@@kiprasbielthis is the correct answer.
@@kiprasbielyes thank you! The perk of nitrox is having a longer no-deco time than you would with regular air at a certain depth!
in free diving you can have a "shallow water blackout" if you ascent to fast, but decompression sickness, difficult
it has nothing to do with fast ascent. SWB comes from low blood-oxygen.
Yes it does. When u come back up, the pressure decreases and so does the partial pressure of oxygen in your blood. Ascending too quickly can prompt your body to shut down due to hypoxia in your brain. This is less relevant in diving, but quite frequent in competitive free diving.
@edouarddrouin4519 no. This has *nothing* to do with the speed of the ascent. Either way, slow or fast ascent, the partial pressure of Oxygen is going to decrease regardless, as the volume in your lungs expands again. This cannot be avoided. Purposely slowing your ascent might actually make you consume even more Oxygen on the way up, increasing the chances of a blackout even further.
Source: I'm a genius
no you cant its not how it works only aplys the scuba not free diving a shallow blackout in frediving is causd by pushing the limits way to much you only breath the air on the surface not the compressed air thtas in a tank at depth
Learned this in a bio class!! It had two names, either the bends or decompression sickness :)
I learned it in chemistry!
I could’ve sworn there was something called nitrogen narcosis aka “diver’s dementia.”
@@EnlightenedByKnowledge there is, but that is different.
In scuba diving over about 30m of depth (4 atms of pressure), the nitrogen starts to become slightly narcotic. Hence can lead to poor decision making. Sometimes it is compared to feeling drunk
@@emilyscloset2648not just the nitrogen, oxygen is also narcotic. that’s why technical divers use trimix which also contains non-narcotic helium in greater depths.
@jfoetidnwo56 as far as I have it, oxygen is not as narcotic as nitrogen. The helium mainly replaces some of the nitrogen.
also when freediving, the only air in your lungs equates to a safe breath on surface, but if you take in any air at depth(from a tank or umbilical), you need to exhale it as you ascend or it will expand and rupture your lungs
I'm facing with slight anxiety watching anything about diving, don't even know how people manage themselves to do it, incredible
you should try it if you ever get the opportunity. it takes minimal practice to dive 20 feet. I know its not for everyone but hey, I used to not like the ocean and now I want to live on a boat so you never know
It is safer to use a bubble system to equateize smoothly...
what is that?
@@olympiaelda1121 it's a safer way to get engaged and proliferate into other evolvements....
transitional love values🐚🎵
@@olympiaelda1121 does answer your mystery standards for now?
let's make it real?
@@jonathansantos2271ok. Now use english.
@@jonathansantos2271we figured by you saying “should’ve used bubble blah blah” that it was safer, we meant what is that method like
By henry's law, pressure increase solubility of gases in liquids. So, when you get back up on the surface the other gases dissolved in your blood come to gaseous state creating various problems. This is known as 'Bends' or commonly as 'Decompression Sickness'.
Cbse student spotted
@@AdityaChauhan.1123 Boards hai 2025 mai 😭.
At a constant temperature.. Sorry to be petty..
@@amgoldi 🫡
TQ for clearing my doubts after watching outer banks s4
that’s exactly what u was thinking
AND THATS WHY I LIKE FREEDIVING. Plus you train you're body and mind!
As a scuba diver who certified at 11,i had a lot to learn, and it was HARD. But 3 most important rules are:breathe bubblea if you air goes away, 2:DONT hold your air, 3:at 5 meter stop, when youre coming up stop a t 5 meters(4, 8 m - 5,2 meters)
this pool looks so funnn i would love to try that one day!
As far as I know: Freedivers also just circulate the air inside their lungs/body instead of breathing in nitrogen air underwater. Meaning the gas don't really build up in the first place.
The scuba regulator provides air to you at 1atm relative to the surrounding pressure. When under 4atm of pressure the air of the scuba diver’s lungs are at 4atm and have maintained the same volume of air. The air in the freediver’s lungs has also compressed to 4atm but the volume has decreased to just 1/4 of the size at the surface. Making a breath hold safe.
I was once in a diving group and one of them got type 1 decompression sickness while scuba diving, because he had only little experience. Could have been much worse but everyone reacted quickly. He luckily recovered pretty fast.
Great diving advice. I have been diving for a couple of years and I’ve never heard such a good explanation of the bends- most people will tell you” “no go up fast very bad 😤” and they won’t explain.
The rule for speed of ascent in scuba diving is don’t rise faster than your smallest bubble and never hold your breath.
and if you get to a certain depth, safety stops or decompression stops on your way up become VITAL. safety stops can take 3-5 min, decompression stops several hours. and they cannot be skipped if you want to live.
as a 13 year old scuba diver who spent 3 weeks learning this, i think that it's pretty impressive u summed up that so well lol
Woah.. I never knew of this! I didn’t expect to end up watching a video like this but it’s very informative
Dad had this, had to get a surgery and stay in a hospital for like 2 weeks. Got super sick.
I remembered a scuba diver who ran out of oxygen(or he panicked, can't recall), so he came back fast without making decompression stops. As soon as he hit the surface, he started screaming with pain & died immediately.
That is a horrific story.
Depends on how long his dive was, the „died immediately“ is very unlikely and/or incredibly unlucky which would usually only happen if he had a gas induced stroke or sth.
Usually you may be in pain (bends) and look forward to some days/visits in the pressure chamber. But otherwise for sports divers no critical damage.
Tec divers on the other hand usually are trained enough to not just run out of air that easily.
@@MetallicReg Unfortunately it happens every year. Some people just forget to account for their SAC rate being different in different temperatures and that can easily balloon into problems at depth.
I’d make a guess that he held his breath on the way up, something that you absolutely never do when scuba diving. Due to Boyle’s law (and taking on compressed air at depth) the air in his lungs could’ve expanded rapidly, leading to over expansion injuries. (Air in the blood, brain, Etc)
It’s common for divers to do this in a panic situation, especially running out of air. Sad, it’s a preventable accident
Could also be decompression sickness, but that doesn’t typically cause death.
When they mentioned Scuba diving, this is called the bends (or properly, decompression sickness) and is extremely difficult to cure once it occurs.
If a person experiences the bends secerely, they must be brought to a decompression chamber, which there are very few of, in order to recover.
The worst cases include neurological issues, paralysis, and fatality. For example, British Melanie Stoddart was on a trip in the Maldives, and, during her scuba dive, she experienced the bends. She unfortunately passed as it took 9 hours to reach a decompression chamber.
I hope this gives some people an insight to the dangers of scuba diving. If any of this is wrong (which is highly likely considering I wrote this off of memory) plesse let me know.
with increase of pressure the air gets soluble in blood but after the pressure is released it makes bubble
That’s only when breathing compressed air.
No
Actually it’s with any air that this can happen, just more common with Scuba divers, because of the equipment being heavy, plus getting themselves out of the water with said equipment.
@@Zaniya3I've seen competitive free diving and they don't do stops like scuba divers do. They go down and come straight back up sometimes using lifts with airbags. I don't see how this is possible if they really have to worry about decompression sickness.
Air compresses at those depths due to the pressure exerted by the weight of the water
@@kyu.misaki7677It's probably because free divers don't have tanks with them. They're not intaking more air than they already did on the surface, therefore their tissues can't become saturated with more oxygen than they started with. Because of that there's less risk of decompression sickness as there's less oxygen in their bodies to decompress.
omg this is so cool! i love the two person dialogue helping. i learned a lot!!! ❤❤❤
The bends! I learned about it in a Christopher Pike book when I was a kid and was so horrified I never forgot 😅
Me learning this from outer banks
Yo, that’s really cool. I kinda wanna try it one day but I can’t, I had this thing “Heart murmur” that doesn’t lemme do that but now it’s gone, it’s just that “Don’t do things if you had a pre-existing condition” but these vids are nice.
As if worrying about decompression isn't enough, you have to worry about claustrophobia being in that long and narrow tunnel.😅
You arent breathing compressed air from a scuba tank so the bends arent an issue.
POV : What if you've been Executed by Drowning Alive like in Deep Dive Dubai Pool?
Up
With scuba, you add air while absorbing what's already inside you, with free diving (holding your breath), there's no extra air to cause any issue..plus the whole part where you cant really stay down there anywhere near as long.
⚠️ If you Inhale air underwater at depth (from a scuba tank or whatever) Exhale as you rise; if you hold your breath from a deep depth and rise quickly without exhaling, the pressure, compressing the gas in your lungs will lessen and the gas will expand proportionally to your ascent
This can be fatal
[Never hold your breath if you find yourself inhaling at depth]
Yep, ive actually took my scuba diving exam a few months ago, you literally have to take a break at 5m for 3min before going to the surface
you dont have to i would say thats kind of bad advice tbh
This is only rlly applied for scuba diving. You stop every 20 Meters to decompress and adjust your body to the new pressure, and swap air tank so you breathe the correct air mixture.
The deeper you go the less time you get to stay down there as the air in your tanks get compressed more and more the deeper you go and therefore you use more of the air mixture.
I have free dived to 14 metres and once you learn to control the mammilian reflex it’s actually a serene experience.
This is why you exhale on your way up... My time in Seal training there was a statement we paid attention to. "Too deep, too long, too bad." Best option is to be tied in tight to emergency decompression entities involved with the major scuba diving certifiers.
I saw an episode in 1000 ways to die about a girl laying in decompression chamber after her scuba session. After a while, a worker went to her door, didn't notice she was there, and turned the latch slightly so some air can get in. Realizing what he has done, she ran to the door screaming and pounding, but it was too late. She exploded like a can of soda that's been shaken.
I learnt this from that box guy that talks about the worst diving deaths
A man spend multiple hours in an underwater cave, he saw one of his friends die, later on another one of his friend died close to the cave exit, he checked his live system meter (a gadget) and it said he must stay 7 Hours underwater, in order to get up safely. 2 more of his friends got lost
He was all alone in the pitch darkness while his friends body was blocking the way out, he used all his remaining strength to push the body away, he got up even tho he knew he Will get decompression sickness on the surface, after he Made it through he realised that the water frozed because he spent more time than expected underwater and didnt get out in time, he pulled off his gear and smashed it over and over onto the ice. After some time it broke and after 12 hours underwater he breathed air for the first time, but he realised his remaining friends is still underwater (he thought) but he saw his cars light turned on "did someone Made it" he thought he tried to see and one of his friends Made it, they called 911 and got treated in the hospital, (one of them died)
There is however something called “shallow water blackout”! Basically as your veins decompress, your body can pull less oxygen from your bloodstream which can cause you to pass out. A really famous surfer from where I live died blacking out while freediving.
The bends! Or decompression sickness. Learned from Man of Medan.
I am a nursing student, the name of the thing about getting air in your bloodstream is called air embolism, it is really dangerous, thank you for this insightful video and be safe out there
Henrrys law :- solubility of gas is directly proportional to pressure
There are measures to avoid the dissolvement of nitrogen!! In long time deep diving, the cylinders are filled with mixtures of helium nitrogen abd oxygen!! It prevents the occurence of amnesia
The only air a free diver has to expand in them is air that was already there, even less if you exhale. Even if it expands all the way, it will only be back to how it was. When scuba diving, you're adding more and more air. If it fully expands, all the soft cavities in your body (especially ears, sinuses, and lungs) risk damage or rupture.
Don't dive if you have nasal congestion. I made that mistake and am now suffering from sinus barotrauma. I went through extremely painful two weeks. Thankfully im almost healed.
I have been 150' in Lake Champlain. Cold and dark. 100 cubic foot tank. Plenty of air to decompress. Too cold to stay down long. I always thought if your not breathing compressed air you didn't have to worry about getting bent. Was I wrong?
There have been a few instances where free divers have died from a ruptured lung while ascending quickly. Air caught in one part of the lung expanding without being able to spread evenly into the rest of the lung. If you do deep dives, get an X-ray first to check that you don't have damaged lungs!
Correction about misinformations:
Your body is not a steel cilinder that can handle enourmous amount of pressure from gas.
If you are not ingesting any air underwater you are not increasing your gas-volume once you surface > you are safe.
If you are just 5 meters below the surface and breath in some air you will create “gas volume surplus” (you start to store more gas in your body than it can safely hold in higher elevations)
As such you can dive for infinite amount of time in infinite debt before the gas from the breath on the surface can do any harm to you.
The gas surplus can result in your blood turning fizzy with bubles if you do not reduce it.
The lower you go more gas do you need to ingest for the same breath and more gasses are bound to your blood. This results in much higher oxidation of the body (you could last 5-120 minutes from the oxygen in your body alone), but at the same time storage of CO2 (which will kill you if you do not exchange it in your lungs with gas that can be bound to your blood instead of it, which turns the 5-120 minutes a breath joyride to do not hold your breath or you will suffer from gas surplus and high CO2 levels and die within 12 minutes pass your last breath [depending on debt, 100 meters and lower increases your gas capacity so much that examples of 30 minutes without air and living are possible with lower depts even higher records should be possible, but such pressures are impossible for scuba divers (submarines only, it should be possible to survive without oxygen supply in a submarine around 1000m bellow surface if there is active CO2 filtration for 30-200 minutes (Maibe even later but expect extreme brain damage)
Btw when those bubbles form it called “getting the bends”
Thanks for the info!
wow, what a gorgeous pool! is it really 40m deep? (guessing from the lack of vis to the bottom of the cylinder in the first shots, and the Y-40 marking at the bottom).
Big love to all free divers, especially those who can safely go so deep! I have run into a handful at 25m-35m out in the wild and always been amazed.
That said, while I agree with the way you explain nitrogen boiling in your tissues causing the bends, what an incredibly stupid way to explain this relative to scuba diving (I'm an accredited scuba pro btw).
When you free dive, you only put air in your lungs at the surface at *1atm* (or, to be more accurate, whatever the pressure is at the surface of the water you enter).
With scuba, if you're down at 40m taking full breaths, those are at 5atm,,,,, If you held your breath going up, you would pop your lungs. You have 5 times as much gas in your lungs (especially nitrogen) and it will have a much larger effect penetrating your tissues and causing the bends compared to a free diver who but 1atm into their lungs.
If your freediving friend came down and tapped your head and then you both went up together quickly, you would have 5x more gas boiling in your tissues.
Yes the time underwater matters with any type of diving, but with free diving the risks of gas absorption are basically negligible compared to scuba.
If I take a breath at the bottom of that amazing pool, with a tank full of regular air (no nitrox/trimix/etc), I need to watch my time for tissue absorption, monitoring depth and pressure for each meter I ascend
I think they mentioned this in outer banks when John B went scuba diving to explore the sunken boat in season 1
As a scuba diver I can confirm this.
Thank you I was worried about this❤
"Y-40" in Italy ...
Well yeah, the y level is -40 down there, can’t you see the deepslate on the walls?
Как же хочется не смотреть в глубину, а плыть в нее❤️
Knowledge is power
I learned how to swim by myself
From watching people and copy then from the Internet.
My diving teacher on the canary islands told me going up wouldn’t be a problem and I was like 45min under water
They don't stay submerged long. You can develop the bends in much shallower water btw. If your submerged for long enough.
I am a scuba diver and it is also quiet hard to make it dangerous mostly because of the limiter air in your tank so you can hardly be underwater to long scuba divers van go up by a max of 18 meters per minute and you have to make a safety stop at 5 meters
Thanks for revising me my old 12th chemistry, i remember the chapter its solutions
Free divers also don’t breath while underwater
I want to the pool just right now and I was swimming so much in the deep end. My stomach hurts and I can’t breathe. I wasn’t on the water by the way I was just standing up.
As a competitive swimmer, I have huge respect for free divers. I could feel my lungs starting to try and force air into them just watching this
Nothing gets compressed. Higher pressure means higher solubility so the gasees get dissolved in your blood and as you ascend and the pressure lowers, the solubility gets lower producing bubbles in your bloodstream and/or tissues..
You're not correcting anyone bro. The gasses do get compressed. When you come back up, as they come out of solution, they also expand. This expansion causes physical damage on a microscopic level. If there was no volume change there wouldn't have been a problem.
I was about to ask right before the end why freedivers dont have to spend extra time coming up while scuba divers do thank you!! ^^
I fell out of a tall tree when I was 5, and collapsed my lungs, unable to breath for 20 minutes or so, while no one thought to help me.
I'm not a fan of chancing things like this. A little ways is ok, but you have to stop when it's your limit.
People don’t just do this. You train to free dive
I would love to swim in a pool like that, but I'm too light, so I just float back up. I have to literally fight to get even a meter under the water. I kept failing my swimming lessons as a kid because of this, lmao
As a diver this is true and i know someone who has died due to this be safe
I went to that pool in italy! It's so nice
I did scuba and diving. I easily got the scuba certificates while i couldn't even get the 1st level certificate of free diving. Free diving is so hard!
but you dont need a certificate for freediving
it’s like in obx, when jj and kie got the bends
man, if i only knew how to swim, that look amazing
I learned recently that when you go deeper around 15 meters your body starts sinking
Only when breathing compressed gas. Not the same freediving. The volume of air you go down isn’t going to expand more than it was when coming back up.
cant imagine doing this, even in clear ocean water i couldnt reach 4m deep let alone sit on a ledge casually at 10m
insane this stuff
Disclaimer: a pois can’t be formed by free diving with a breath hold from ambient air (1 ata)
my grandpa was a world class spear fisher when one day he resurfaced from 30 meters to fast and now he is a paraplegic but he manages well
i dont think so
@@bluefish-man why the hell would I lie about someone who almost died in the ocean. If you don’t believe me that much search him up, Dennis Okada.
@@Cotton-xs5ib because you said he was a world class spear fishermen i assumed he wouldnt be scuba diving because the standard is for spearfishers to hold their breath where you cant get the bends obviously he wasnt freediving but it still surprises me how he got decompression sickness while being such an experienced diver.
Does your ear canals hurt when you go down that deep?
Not if you equalize
Anyone has tips to how to prevent water entering/hurting the ears?
you two have really nice voices ^^
This is still my favorite ending to Man of Medan.
i think it’s called the bends like when the bubbles get into ur blood you get a stomach ache and a headache and you have to go to a chamber in the hospital
THE BENDS MENTIONED 💯💯💯‼️‼️‼️👅👅👅👅👅🗣️🗣️🗣️🗣️🗣️ My baby's got the bends oh no!!!!!!
I do not care to ever dive deep. I prefer to maintain at the surface. Thank you.
You gotta watch out for those mad lads who can hold their breaths for 20 minutes.
I still get nightmares about pools like this 😭
I learned this because of the godzilla minus one 😅😂
When scuba diving you breathe air at the same pressure that is in the water outside, while free diving you still have the same air you had when you took your breath out of the water at 1 Atm.
It also because you dont add extra oxygen. its the same volume troughs the dive. With scuba you add more more compressed oxygen in your cells
As a scuba diver I can confirm this is dangerous
its not
When she said "ciao!" I had a crezy neuron activation
I learned this from outer banks❤
Thank you pope and JJ 😂
Used 2.0 ATA or greater pressure in a hyperbaric chamber should you run into an issue doing just that and your life is in danger. You should be OK within a few hours.
My dad who worked in the navy and is a PA (physicians assistant) taught me a trick, let out some air and only rise as fast as the bubbles do, that should be slow enough to let everything go back to normal in your body.
Safety stop is still good
More (immediately) dangerous in SCUBA diving is lung overexpansion injuries, as your lungs sort of explode if you ascend while holding your breath of compressed gas - the golden rule is never hold your breath.
This doesn't happen in free diving as the original breath was at surface pressure.
Also in scuba diving it's called decompression sickness