| A | B |
|---|
| physical fitness | when each of the systems of the body works good |
| exercise | an activity that makes the body work hard |
| aerobic exercise | an activity that makes the body use a lot of oxygen |
| circulatory system | heart, blood and blood vessels |
| muscular system | muscles of the body |
| skeletal system | the bones of the body |
| endurance | being able to exercise a long time without feeling tired |
| flexibility | being able to move your joints freely |
| posture | the way a person holds the body to sit, stand, and walk |
| 3 parts of a workout | warm-up, workout, cool-down |
| fatique | feeling tired |
| sleep | allows the body time to rest and fix it's self |
