Across
- 4. activity that improves oxygen levels
- 6. the amount of weight you can lift
- 7. exercise that requires short bursts of enery
- 8. extreme force or energy
- 9. continue to increase demands on the body systems
Down
- 1. heart and blood vessels
- 2. range of motion in a joint
- 3. number of times completed
- 5. exercising too frequently, too intensely