What is physical fitness? the improvement of the body through intentional movement- the speed at which the body moves during exercise- the ability of the body to function efficiently during exercise- the performance of muscles for long periods of time

Respuesta :

I would say it is the ability of the body to function efficiently during exercise 
MegH07
I would say D) The performance of muscles for long periods of time. 

Because if you are physically fit, you can run, or exercise, or do other things without getting out of breath, and you can do them for a while.