Aerobic exercise can undermine the recovery
process,
at best delaying recovery and
at worst, worsening your condition, he says.
The reason more mitochondria don't always mean that you run faster (instead of longer) is because (1) you may have far more mitochondria than necessary to
process the maximum amount of oxygen your lungs can take in and your red blood cells transport
at any given time, (2) regardless of how many mitochondria you have, the motor neurons connected to your
aerobic muscle fibers are smaller than those connected to your anaerobic muscle fibers.