It is different for everyone, remember that you are always using both, so i guess you mean when does the predominate system become anerobic. It is different for everyone because we all have a...
Ah very good question. Aerobic fitness, which is any form of fitness that lasts over 12 minutes or so, uses oxygen to supply your body. Anaerobic fitness, does not use oxygen.
if you need to find...
1. to improve the body's ability to recharge creatine phosphate, work flat-out to 15 secs then rest for 4 to 5 minutes. 'Resting' means very slow jogging. 2. to improve the body's ability to dispose...