Aerobic fitness is related to how well your heart gets blood to your muscles. body composition refers to body makeup, including percentage of fat, the ratio of fat to muscle, level of hydration, and bone conditioning is concerned with the strength and stability of the and more than percent of your daily calories should come from fat.

1. oxygen
2. density
3. trunk, spine
4. 30

People who utilizes the progression principle will ensure their exercise program increases in frequency, intensity, time, and type. the changes need to happen gradually in order to ensure they make gains in their fitness program. a person who doesn't utilize the progression principle can still gain health benefits from exercising, but will not continue to improve in cardiovascular fitness.