Most experts agree that physical fitness can be broken down into five basic areas: cardiorespiratory or aerobic endurance, muscular endurance, muscular strength, flexibility, and body composition.

Cardiorespiratory or Aerobic Endurance: This is the ability to complete moderately difficult activity over a period of time. The cardiovascular system includes the heart and blood vessels.

Muscular Endurance: This is the ability to repeat a movement many times or to hold
a position for a certain period of time before getting tired.

Muscular Strength: This is the ability to lift the heaviest weight you can one time. It is possible to have muscular strength in one area of the body but not another. Strong muscles help people stand, walk, work, and play.

Flexibility: This is how limber or flexible you are.