Exercise Metabolism Part 2 of 2 - Measuring Metabolism (UPDATED VERSION IN DESCRIPTION)

THIS PLAYLIST IS THE UPDATED VERSION OF THIS LECTURE
Exercise Metabolism Playlist
• Oxygen Deficit and Exc...
Exercise Physiology Teaching Current Edition Playlist
• Introduction to Metabo...
This video shows Dr. Evan Matthews discussing how to measure aerobic energy production during exercise. This video is specifically designed for use in an exercise physiology course.
For more information it is recommended that you read the following:
W. Larry Kenney, Jack H. Wilmore, David L. Costill Physiology of Sport and Exercise 7th ed. Chapter 2, 5.
Scott K Powers and Edward T Howley Exercise Physiology: Theory and Application to Fitness and Performance 10th ed. Chapter 4, 15.
VO2max Measurement
• VO2max Testing using a...
Ratings of Perceived Exertion
• RPE - Rating of Percei...
Exercise Metabolism Part 1 of 2
• Exercise Metabolism Pa...
Exercise Physiology Teaching Current Edition Playlist
• Introduction to Metabo...
Exercise Physiology Teaching 1st Ed Playlist
• Introduction to Exerci...
Link to Dr. Evan Matthews website.
sites.google.com/site/evanmat...

[@Pradip7PT]

A very informative lecture..

[@VivoPhys]

Thank you!

[@BrandonBB4]

Awesome videos! I have a biology degree, work as a software engineer and I love exercise. These videos are engaging and informative even for someone that doesn't plan on taking an Exercise Physiology course or plans on going into the field. I plan on watching the whole series!

[@VivoPhys]

I'm glad to hear they are being helpful!

[@dez945able]

ya

[@dez945able]

thanks

[@VivoPhys]

Hi dez945able. I hope it helped.

[@javiergs9837]

About the concept of low intensity exercise and fat burning. If one keeps the level of intensity low enough relative to one´s VO2 max, then one can maintain that level of exercise for longer and don´t burn out fast and therefore be able to burn fat for longer as energy source. Doesn´t that make sense, especially at low level of VO2 max and low LTP? Thank you

[@amalck3544]

Sir ,thanks for these valuable informations.
I have some doubt.By your informations, protein metabolism high in intensity workouts.but prolonged exercises has 5% break down of protein than short duration exercise.
By this what should be the ideal intensity and duration for a bodybuilder to lose fat.

[@ancientmovement3864]

Thanku sir for information

[@VivoPhys]

I'm glad it helped.

[@patrickkelly885]

What percentage of fat to carbohydrate would you expect to burn at lactate threshold ? or would it depend person to person ? great videos by the way

[@VivoPhys]

Thank you. I believe it would very by person.

[@prepinbulk]

life savior

[@user-yp7ly7js6w]

Amazing explanation , thank you.

[@nursarah2586]

Thank you Dr for the great explanation.Can you explain on muscle glyogen as primary source of carbs during high intensity while blood glucose as primary source of carbs during low intensity exercise. Thankyou.

[@VivoPhys]

I'm glad you found this video helpful. Sorry I do not have any videos on that topic. It is also not a topic I have studied myself. If you have any good resources on it please reply with a link here.

[@nursarah2586]

@@VivoPhys I've read about it on this website, pg 45 www.slideshare.net/omarou18/exercise-metabolism

[@VivoPhys]

Looking at slide 45, it appears they are talking about how long duration exercise (must be lower intensity to exercise for a long duration) relies on blood glucose from liver gluconeogenosis. If I'm understanding it correctly. This is because the muscle has already ran out of muscle glycogen. Not because low intensity exercise itself causes you to use blood glucose instead of muscle glycogen. This may be true too, I don't know. However, I don't believe that is what that slide is trying to say.

[@nursarah2586]

@@VivoPhys Okayy thankss!

[@gabrielreichertblume1865]

@@nursarah2586 It may be more complicated than this but glucose use is dependent on the amount of transporters available in the muscle, amount of blood glucose, amount of muscle glycogen and activity of glycogen phosphorylase (enzyme that breaks down muscle glycogen). So since exercise duration is not taken into consideration here we can exclude amount of blood glucose and muscle glycogen. So there are two ways glucose transporters into the muscle are facilitated: insulin and exercise. I am not sure if exercise intensity has an affect in exercise induced glucose transporters. In the other hand, insulin is influenced by epinephrine, in which high concentration of the latter decrease the amount of insulin in the blood. Epinephrine also increases breakdown of muscle glycogen. At high exercise intensities there an increase in epinephrine being released. To summarize, low exercise intensities, more insulin (more transporters) and less glycogen breakdown, so glucose is predominantly used. At high exercise intensities there is less transporters available for glucose and higher glycogen breakdown, so muscle glycogen is predominantly used. faseb.onlinelibrary.wiley.com/doi/epdf/10.1096/fasebj.5.8.1827082
A lot of the info I got it from here, but also extrapolated from own knowledge.

[@mtldragon9860]

Regarding 21:40 "fat metabolism goes down," does the body use less fat as RER increases or is it the percentage of fat that goes down?

[@VivoPhys]

Good question. Generally speaking fat metabolism decreases at high exercise intensities and carbohydrate metabolism increases as intensity increases. Here is an article to read that shows some of the nuance with fat metabolism.
Romijn JA, Coyle EF, Sidossis LS, Gastaldelli A, Horowitz JF, Endert E, Wolfe RR. Regulation of endogenous fat and carbohydrate metabolism in relation to exercise intensity and duration. Am J Physiol. 1993 Sep;265(3 Pt 1):E380-91. doi: 10.1152/ajpendo.1993.265.3.E380. PMID: 8214047.

[@dez945able]

hi, what would be optimal to burn fat for bodybuilder 70? 80, or 9o of max thanks

[@VivoPhys]

I do not know the literature specific to body builders. I know a lot of body builders attempt long duration low intensity exercise in an attempt to primarily burn fat during exercise in an attempt to reduce muscle wasting during cutting phases. I'm not sure if these outcomes are confirmed by science or not.

[@ancientmovement3864]

Sir pls upload video for ACSM course.

[@VivoPhys]

I have an entire playlist about the ACSM recommendations called Exercise Assessment and Prescription Teaching. Please go find that playlist on my channel.