Physical fitness is a state of health and well-being and, more specifically, the ability to perform aspects of sports, occupations and daily activities. Physical fitness is generally achieved through proper nutrition, moderate-vigorous physical exercise, and sufficient rest.
- If it's a pill or something, someones body could react badly to it
- Age definitely effects it
Pectoral Mussel I think
I hope this helps <span />
1. Hospital
2. U.S army radiology specialist
3. CDC
Hopefully one of those helps