Ventilatory, Anaerobic and Lactate Threshold Made Easy!

In this video, I explain the physiological basis of the ventilatory threshold and describe how it relates to the anaerobic and lactate threshold.

[ippeikawano]

Glycolysis itself produces no CO2, it rather comes from HCO3-buffering lactate. Otherwise, great video! Thanks for making it.

[snowleopard]

There are a few errors. VT1 is the 'ventilatory threshold' and oxygen uptake will start to deviate from CO2 exhalation. The VT2 is called the respiratory compensation point.
This is most easily visualised by the 'ventilatory threshold', where VE/VCO2 will drop, then flatten out (isocapnic) between the VT1 and VT2 and then increase again due to hyperventilation past the respiratory compensation point. Respiratory compensation is not a compensation to elevated CO2, but lowered pH and actually leads to a relative hypocapnia.


The anerobic threshold is associated with, but should not be considered synonymous with either threshold, since this is more of a peripheral phenomena, depending on the relative metabolic balance of the respective motor units and their activation. Likewise the lactate threshold isn't of key importance, because it is the large increase in the rate of glycolysis, rather than the accumulation of lactate that causes acidosis and there are various buffering mechanisms. (Remember that lactic acid is less acidic than pyruvic acid and pyruvate from glycolysis is an input to the citric acid cycle and consequently oxidative phosphorylation).

[thomassefo]

Thanks for this video, it can be a very complicated topic, and you explained it very well, and made it easy to understand, cheers

[xkzielinski]

Great video, very well explained! Thank you!

[autosuggested]

Fascinating video, well presented. Thanks!

[shellytodd]

Great video. Information is extremely helpful with my studies for my final exam in Ex. Phys. The video reinforces the lecture materials that I received in class.

[dariogenovese]

I just wanted to say "that's great!". Many thanks for posting it.

[santoshponnan]

Dr Sandoo, thank you so much for explaining this so clearly. Fantastic you tube channel. I am sports physiotherapist and this is so helpful 👍

[meseretmengistu]

Thank you! everything is clear for me. Bless you.

[cindysmallwood]

Thank you so much for putting all this information together in an easier to understand way than my textbook!

[michaelregan]

Excellent video, thank you for this. You did a great job of explaining this to a person uneducated in the subject.

[breathemovebliss]

Excellent - very clear and thorough. Thank you!

[sixzeroes]

Great explanation. I just started my journey towards a pt certification and this really helped expand my understanding of the material. Thank you!

[abhisheksharma]

I have been waiting for so long, plz keep posting 👍

[ChrisTodd]

Thanks so much for such an informative and clear description. Many thanks - it really helped my understanding.

[ivicaperez]

thank you for explanation! Ive been doing a course and they did not explained properly many things, you gave it a great form and explanation on example, I really like it :)!

[tommyv]

Thank you, made very clear and easy to understand.

[alexcolin]

Wow, thanks so much! This was a great refresher!

[acmepune]

Hello Dr Aamer,
Thanks for this elaborate video. I am interested in knowing about the fatty acid metabolism occurring concurrently with glucose oxidation, which is also generating acetyl-CoA and ketones at extremes of exercise. Please offer your expert comments. Regards
Dr Suresh Shinde, MD.

[jorgehan]

Excellent explanation. Thanks so much!