These videos are unbelievable. Extremely clear visuals and delivery. Very helpful in my Nutrition classes. I'm also very impressed in your effort to respond to all the comments. Keep up the great work!
Oxygen deficit occurs any time you increase exercise intensity. It is the temporary use of anaerobic energy when you are capable of using aerobic energy to sustain the activity. Anaerobic threshold is usually around 50-60% of VO2MAX in untrained people and higher in trained people.
Interesting thought. I'm not familiar with the specific physiology of that sport. Given the lack of continuous pulmonary respiration, I'm guessing there is a strong anaerobic component and very low overall metabolic rate. The anaerobic component would have to increase over time rather than decrease as it does during the transition from rest to continuous aerobic exercise.
Good question. This is probably a true statement but the relationship might not be direct. High VO2max is generally equated to high aerobic fitness. High aerobic fitness is associated with quicker establishment of steady state aerobic metabolism and lower O2 deficit.
@@VivoPhys Thanks and appreciate ! I am using the fitness tracker like Garmin and suunto. There is all kind of measured based on Epoc but kind of confusing.
@@VivoPhys So if we’re talking about someone’s who’s jogging (Low intensity) and he decided to do a 100m sprint with maximal energy (high intensity) would it be right to say that : At Low intensity, anaerobic respiration would always occur first which is why there are small amount of lactate being produced. Aerobic respiration will take awhile to catch up and provide the body energy. When the body goes into high intensity, anaerobic respiration would be in effect and aerobic respiration even at VO2 MAX will not be able to provide the energy needed thus anaerobic system will be dominant. And this give rise to lactate in the blood. Sorry for the long response, just wanted to clear my doubts!
I'm not sure I'm completely following you, but all exercise that uses very high work rates will use primarily anaerobic metabolism. Any exercise above the anaerobic threshold (or lactate threshold) will use substantial amounts of anaerobic energy and cannot be maintained for long. This will result in lactate buildup. For most people this will occur at about 50% of VO2max. Also if increasing exercise intensity but staying below the level where anaerobic metabolism would dominate, until steady state is reached an increased amount of anaerobic metabolism would be used.
Where does the excess oxygen come from in EPOC? Metabolic processes? The term oxygen "consumption" has always confused me - I understand that the body needs more oxygen to return to homeostasis but WHERE does the oxygen needed for recovery after high intensity exercise come from? People certainly don't continue to breathe heavily after exercise. Thanks in advance.
I fail to explain why HIIT & Tabaca is so good compared to normal cardio because EPOC is too complicated for me to explain, in fact I don't even know how it works, so I will study this video, thanks !!!
how scientists know the pink area is oxygen deficit. & why the corner of the pink, stop at one point. is there any calculation . I am not good in maths. I'm a biology teacher. thanks a lot.
I don't know all the research used to prove this. Typically it's a wide array of complementary and incremental findings. However, we can measure oxygen consumption with a metabolic cart to easily show that it takes time to increase aerobic metabolism. From that the rest can be assumed because we cannot have power output without energy.
These videos are unbelievable. Extremely clear visuals and delivery. Very helpful in my Nutrition classes. I'm also very impressed in your effort to respond to all the comments. Keep up the great work!
Thank you!
At what point will AE Threshold happens & at which point AN threshold by increasing intensity of exercise & oxygen deficit?
Oxygen deficit occurs any time you increase exercise intensity. It is the temporary use of anaerobic energy when you are capable of using aerobic energy to sustain the activity. Anaerobic threshold is usually around 50-60% of VO2MAX in untrained people and higher in trained people.
Thank you for the wonderful explanation, really helped me understand the graph
I'm glad it helped.
Amazing explanation.. thank you for making this helpful video!
Thank you. I hope it helped.
I’d be so curious to know how this would change for a sport such as freediving where the whole performance is done on a single breath.
Interesting thought. I'm not familiar with the specific physiology of that sport. Given the lack of continuous pulmonary respiration, I'm guessing there is a strong anaerobic component and very low overall metabolic rate. The anaerobic component would have to increase over time rather than decrease as it does during the transition from rest to continuous aerobic exercise.
Thanks for the presentation! Can I conclude that the higher the Vo2max will cause lower epoc? Thanks !
Good question. This is probably a true statement but the relationship might not be direct. High VO2max is generally equated to high aerobic fitness. High aerobic fitness is associated with quicker establishment of steady state aerobic metabolism and lower O2 deficit.
@@VivoPhys Thanks and appreciate ! I am using the fitness tracker like Garmin and suunto. There is all kind of measured based on Epoc but kind of confusing.
Thank you this is very interesting. Lactate to glucose - would that be through the cori cycle?
Hi Tony Rabone. Yes, it happens in the liver and is called the Cori cycle. It is a form of gluconeogenesis.
These videos are really great!
I'm glad you like them.
thoroughly explained and thoroughly understood sir,
regards from India 🙏
Thank you!
Do you mean Anaerobic energy is always produced first until aerobic energy is able to take over? (In low intensity exercise)
Yes.
@@VivoPhys
So if we’re talking about someone’s who’s jogging (Low intensity) and he decided to do a 100m sprint with maximal energy (high intensity) would it be right to say that :
At Low intensity, anaerobic respiration would always occur first which is why there are small amount of lactate being produced. Aerobic respiration will take awhile to catch up and provide the body energy.
When the body goes into high intensity, anaerobic respiration would be in effect and aerobic respiration even at VO2 MAX will not be able to provide the energy needed thus anaerobic system will be dominant. And this give rise to lactate in the blood.
Sorry for the long response, just wanted to clear my doubts!
I'm not sure I'm completely following you, but all exercise that uses very high work rates will use primarily anaerobic metabolism. Any exercise above the anaerobic threshold (or lactate threshold) will use substantial amounts of anaerobic energy and cannot be maintained for long. This will result in lactate buildup. For most people this will occur at about 50% of VO2max. Also if increasing exercise intensity but staying below the level where anaerobic metabolism would dominate, until steady state is reached an increased amount of anaerobic metabolism would be used.
Where does the excess oxygen come from in EPOC? Metabolic processes? The term oxygen "consumption" has always confused me - I understand that the body needs more oxygen to return to homeostasis but WHERE does the oxygen needed for recovery after high intensity exercise come from? People certainly don't continue to breathe heavily after exercise. Thanks in advance.
People do breathe heavier after exercise. Initially, it is much heavier, then it is more subtle for a prolonged period.
Awesome stuff! Super interesting
I'm glad you like it. More is coming.
Great content as always
Thank you!
I fail to explain why HIIT & Tabaca is so good compared to normal cardio because EPOC is too complicated for me to explain, in fact I don't even know how it works, so I will study this video, thanks !!!
I hope it helps.
how scientists know the pink area is oxygen deficit. & why the corner of the pink, stop at one point. is there any calculation . I am not good in maths. I'm a biology teacher. thanks a lot.
I don't know all the research used to prove this. Typically it's a wide array of complementary and incremental findings. However, we can measure oxygen consumption with a metabolic cart to easily show that it takes time to increase aerobic metabolism. From that the rest can be assumed because we cannot have power output without energy.
Good information.
Thank you!
👏👏👏
Thanks alot. Can you add translation into arabic in the video, please?
I'm not sure how to do that. I also don't speak Arabic. Sorry.
If you find any application that can help you to do that ,I will be very grateful, doctor.