Exercise Metabolism Part 1 of 2 - Energy Systems (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 the body creates energy to support an exercise session. 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.
Image of a damaged muscle fiber following intense exercise training (see figure 2)
www.physiology.org/doi/full/1...
Exercise Metabolism Part 2 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...

[@KarlAxelZander]

Thank you for sharing this quality- and easy accessible content to the general public!

[@VivoPhys]

You are welcome!

[@liyanaruslan365]

Thank you for your lecture Dr ! It helps me to survive online learning

[@VivoPhys]

I'm glad to hear it helped.

[@yagmurklc8196]

Thank you for your perfect videos!

[@VivoPhys]

I'm glad they are being helpful!

[@ayda.mohammed]

Perfect lecture 🙏 thanks a lot, sir ,for sharing this valuable information 🌹🌹

[@VivoPhys]

You are welcome.

[@nahumnahum2764]

Thank you doc for your brief explanation

[@VivoPhys]

I'm glad it helped.

[@jebapt]

Useful lecture.. Thank you so much Dr..

[@VivoPhys]

I'm glad it helped.

[@anteradan3120]

Thank you for this video.

[@VivoPhys]

I hope it helped.

[@user-bj3vm3xd3i]

Fantastic explanation you did.

[@VivoPhys]

Glad it was helpful!

[@mohammedkhlile2368]

Many thankes for you dr

[@VivoPhys]

You are welcome.

[@rachaelpatricia9865]

Great video though thank you.

[@VivoPhys]

Thank you Rachael Patricia!

[@ty_b.i_bluemy_3931]

Thanks for explaining well Im M.phil physiology student and its first time im learning this so i have many questions. When they say aerobic and anaerobic exercise, what does it mean exactly? They say that when you sprint you use anaerobic and incase of marathon its aerobic. I want to know the exact sequence of shifts between metabolic pathways

[@Pauliuris]

There are no exact shifts, it's all a continuum.

[@mohamedsaed9157]

Hello Doctor, I hope you reply to me I have a question that makes my brain melt thinking about the question for days if I am training for muscular endurance the 50 60% RM for higher reps we are training red muscle fibers here as it has a lower threshold and can hold the force production for longer periods with weight this muscle fibers primarily uses the oxidative pathway to regenerate the ATP my question is in first movements does these fibers when first get recruited uses the ATP Stores in the muscle before replenishing it with the oxidative pathway?

[@VivoPhys]

All cells would use the available ATP before attempting to create more.

[@juniorkhamisautbah4166]

Please can I get a book of yours on exercise physiology

[@VivoPhys]

I'm glad the videos are helping. Unfortunately, there is not a book that goes directly with the videos. I recommended either Larry Kenney's or Scott Powers' text books.

[@dez945able]

hi, do you think that when i have lots of acids, - sore muscle, it makes more ATP? cause I had before, and the result was better as long as weights, i felt sore after all work out, thanks

[@VivoPhys]

High acid concentrations in the muscle means high rates of anaerobic metabolism is occurring. Keep in mind that long lasting soreness is not from long lasting high concentrations of acids. It's likely due to muscle damage from the work performed or from inflammation.

[@saifalarabi4491]

Hi Evan, In your opinion what will be the best intervention to burn fat, especially intra-abdominal fat? Will it be cardio or resistance exercises? Or just fasting?

[@VivoPhys]

Diet and exercise together is best. Aerobic exercise burns more calories than resistance exercise. So it should be the focus of your exercise routine when attempting weight loss. Resistance exercise is still great for you and should be included but for other reasons. Fasting only works short term because you end up just eating bigger meals once you become accustomed to it. A balanced diet reducing calories is the only effective diet plan long term. With both exercise and diet, don't start something you cannot do for the rest of your life. Behavior and lifestyle change is necessary for long term weight loss. Short term diet and exercise routines only work short term. It's like medicine. If you stop taking it, it stops working.

[@saifalarabi4491]

@@VivoPhys that's very generous answer. Thanks 👍

[@rohitpandit5961]

Sir can you share pdf please, and sir i have a question i dont understand what is the meaning of lactate threshold?

[@VivoPhys]

Hi Rohit Pandit. I am sorry, but I only share my presentation material with my students. It is in an effort to maintain the value they are paying for. Measuring the lactate threshold is a way of assessing when anaerobic energy dominates, and effort becomes very difficult. What this video to learn more: kzbin.info/www/bejne/mqDbd4aFiK2eY5I

[@patrickkelly885]

Hello am I correct in thinking if from this video that if I was to increase the mass of my fast twitch muscle fibres it would decrease my lactate threshold as the fast twitch fibres would be converting more pyruvate to lactate acid ? and possible recruit more fast twitch fibres ? also in reverse if the fast twitch fibres were fatigued or detrained would that cause an increase in lactate threshold ?

[@VivoPhys]

I think it's a bit more complicated than this. Fast twitch fibers do produce lactic acid more readily because they are worse at aerobic metabolism compared to show twitch fibers. However, increasing muscle fiber size means there is also more muscle mass to share in the work and distribute the acid. On the other side. If you fatigue or in some other way reduce the fast fibers that can produce force then you would be forced to rely on slow fibers that produce less force and less acid. I really don't know the answer. If you come up with something definative please share it here.

[@patrickkelly885]

@@VivoPhys thank you for your reply just a thought I had as I was listening to the video, maybe a research project for someone.

[@ty_b.i_bluemy_3931]

But i read that fast twitch and slow twitch are genetically predetermined and you can't increase one type through training. Its in guyton

[@VivoPhys]

That's true, but you can make their phenotype shift slightly to behave more like another fiber type. In reality muscle fibers exist on a continuum not as distinctly different types as we teach for simplicity.

[@patrickkelly885]

TyonGF Nim kzbin.info/www/bejne/p6HUmqqBjrZ5fsk hear is a in depth videos about muscle fibre type by another PHD

[@gayatrilad2322]

Hello sir..Please help me with this doubt. If a question is "is lactate threshold and ventilatory threshold same" ? What would be the answer. So much confusion. Please help

[@VivoPhys]

Sorry, but I think this is better left to a discussion with your professor.

[@kellyjohnson2445]

Why do you use lactate acid term? Lactate acid doesn’t exist. It’s lactate and h+ ions.

[@VivoPhys]

You are correct that lactic acid is not produced by glycolysis, and is not the cause of metabolic acidosis from exercise. In fact lactate actually counteracts acidosis. The main cause of metabolic acidosis appears to be the breakdown of ATP produced by glycolysis when the mitochondria is unable to uptake the protons produced (when exercise intensity is too high). That is an error in this and some of my other lectures. Unfortunately, I learned this shortly after finishing this lecture series. When I eventually redo my lectures I intend to fix this and other errors that have been identified by intelligent viewers like yourself. Thank you! I am always learning and trying to improve my knowledge base. For more information on this please see this link. pdfs.semanticscholar.org/61cf/69c5e71f865ef1a6080d013448ed2f1336ba.pdf

[@VivoPhys]

Please see my updated videos on this topic in the description.

[@rachaelpatricia9865]

Do you mean lactate? My understanding from my human nutrition degree is that we do not produce lactic acid and this is widely misunderstood in the sporting world. You did refer to lactate at the state then switched they are obvs both very different things.

[@VivoPhys]

Yes. My understanding was incorrect on the role of lactate when I made some of these videos. In time I hope to make updated videos correcting this.

[@rachaelpatricia9865]

@@VivoPhys it’s fascinating isn’t it. I’m only year 3 and graduate this year , I am also level 3 PT and was taught the exact same thing and it is so engrained into the community!!

[@rachaelpatricia9865]

@@VivoPhys your video is super helpful though helping to prepare me for an exam. So thank you.

[@VivoPhys]

It really is. Unfortunately it ripples through a lot of the other content in exercise physiology as well. Fortunately the practical applications of the material is largely unchanged. Just the theoretical understanding is incorrect. It's incorrect in a lot of exercise physiology textbooks too.

[@VivoPhys]

@@rachaelpatricia9865 I'm glad they helped!

[@evanrutherfordlazyahole9079]

Shhhhhhh im not a robot....

[@VivoPhys]

Shhh.... me either