Measuring Energy Expenditure of the Body - Direct and Indirect Calorimetry and Oxygen Consumption
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- Опубликовано: 29 авг 2024
- This video shows Dr. Evan Matthews explaining the basics of measuring energy expenditure of the body. Both direct and indirect calorimetry are discussed. Direct calorimetry is how oxygen consumption (VO2) is measured. A brief discussion of calories and the use of a bomb calorimeter to assess calories in food is also given. This video is part of a series of videos that will cover exercise metabolism. The playlist to that series is listed below.
Exercise Metabolism Playlist
• Oxygen Deficit and Exc...
Exercise Physiology Teaching Current Edition Playlist
• Introduction to Exerci...
Learn the basics of bioenergetics by watching my Bioenergetics Playlist
• Introduction to Metabo...
Videos in the Exercise Metabolism Playlist to check out:
Oxygen Deficit and Excess Post Exercise Oxygen Consumption EPOC - VO2 Kinetics
• Oxygen Deficit and Exc...
Exercise Duration and the Primary Energy Pathway - Exercise Metabolic Transitions
• Exercise Duration and ...
Exercise Intensity and Fuel Selection - Carbohydrates vs Fats
• Exercise Intensity and...
Aerobic Capacity (VO2max) and Anaerobic Thresholds
• Aerobic Capacity (VO2m...
Lactate Removal and Use - Delayed Onset of Muscle Soreness
• Lactate Removal and Us...
Measuring Energy Expenditure of the Body - Direct and Indirect Calorimetry and Oxygen Consumption
• Measuring Energy Expen...
Making Sense of Oxygen Consumption Terminology
• Making Sense of Oxygen...
Respiratory Exchange Ratio (RER) Explained
• Respiratory Exchange R...
VO2max Testing using a VMax Encore Metabolic Cart
• VO2max Testing using a...
Relative to Absolute VO2 and Calories Calculations
• Relative to Absolute V...
Exercise and Fitness Calculations Playlist
• Exercise and Fitness C...
Link to Dr. Evan Matthews website.
sites.google.c...
Nice ,understandable and informative video . Thanks for this 😊😊
I'm happy it helped.
Thanks for the video. May I ask how to calculate resting energy expenditure based on V'O2 and V'CO2 in indirect calorimetry?
Hi @shu-chunhuang7344. If you have VO2 in L/min you can just multiply by 5 to get kcal/min burned.
@@VivoPhys Is it a simplied form of Weir formula: 3.9VO2+1.1VCO2 ？
Hi @shu-chunhuang7344. I am not familiar with the Weir formula. I quickly looked things up, but did not have time to read it in detail. Based on the Wikipedia page, yes, but take that for what you will. I've pulled the conversion factor I use from various ACSM textbooks and the Compendium of Physical Activities. See citations below. Please let me know what you figure out once you dig deeper on this.
Weir Formula Wikipedia Page
en.wikipedia.org/wiki/Weir_formula#:~:text=The%20Weir%20formula%20is%20a,VO2%20%2B%201.1%20VCO2)
Weir Formula Reference
www.ncbi.nlm.nih.gov/pmc/articles/PMC1392602/?page=1
Compendium of Physical Activities page giving the conversion factor I use.
sites.google.com/site/compendiumofphysicalactivities/help/unit-conversions?authuser=0
For some reason the automatic captions think you speak in Vietnamese !?
Nope. Not in my skill set.
How you do the background presentetion video format?
The presentation is a screen recorder software. My image is filmed in front of a green screen. Then they are put together using Adobe Premier.
I really appreciate that thank you so much
I hope it helped!
can you use the metabolic cart for lets' say 5 minutes? what is really an ideal time to measure energy expenditure when you measure activities like walking or jogging?
It is common to measure "steady state" VO2 during graded aerobic exercise in using 3 minute workloads. The final 15-60s of the 3 minute workload would be used to determine the individuals VO2 for that intensity. So it does not take long if they are in steady state.
Well done video. Thks for sharing. But isn't there a difference in oxygene available as we go up higher in altitude ?
At altitude the percentage of the air that is oxygen is still any 21%, but the air density decreases as air pressure decreases. This means less oxygen enters our lungs per liter of air. Metabolic carts account for this.
You can also see this video on exercise at altitude for more information: ruclips.net/video/xQgYu4p1hvc/видео.html
Super interesting 🙌🏻
I'm glad you liked it.
what patients are eligible to use indirect calorimetry?
I can not think of a patient group that indirect calorimetry wouldn't work for. Maybe others can. There might be situations where people are unable or unwilling to tolerate the methods though.
Can you please help me with this question
The gross energy intake of Vicky is 4,000kj, the energy content of her faeces and urine are 600kj and 259kj respectively. if her gaseous energy lost is 220kj. calculate her digestive energy intake (DE) and metabolizes energy intake (ME)
It's probably best you ask your instructor for help.
Sir please make a video on doubled lable water 🙏
That would be an interesting video. Unfortunately it isn't a topic I know much about at this point.
@@VivoPhyshello sir, how about now? It's been 2 years 😊?
Sorry. I don't use this technique. So I doubt I'll ever be able to make a quality video on it.
Thanks bro
You are welcome!