Comment by nckthrn
3 years ago
Cycling is only approximately 25% mechanically efficient, so the parent is correct. There's a lot of heat to get rid of.
3 years ago
Cycling is only approximately 25% mechanically efficient, so the parent is correct. There's a lot of heat to get rid of.
Apparently 700kcal burned per hour of cycling is a pretty realistic number.
https://www.welovecycling.com/wide/2020/05/14/how-to-convert...
Also resting kcal burn might be around 1800 per day. So 40% increase in of calories burned by hour of cycling per day every day is achievable.
The question is how can you breathe out additional ~10h of CO2 within an hour?
3 times deeper breathes 3 times faster? Because that carbon has to go somewhere.
The CO2 concentration going up in the blood increases the efficiency of respiration (because it is ultimately diffusion).
You don't necessarily need to exchange 10 times the volume of air to deal with the additional CO2.
Range given for concentration of CO2 on exhaled air is 4-5%
So it looks like it could be 25% difference at most.
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