Across
- 5. when body loses heat fast
- 7. easily move muscles and joints
- 8. brain injury that results from a jolt to head
- 11. amount of energy the body uses per minute
- 13. how often you engage in physical activity
- 14. person's heart rate
- 17. using oxygen to break down energy in muscles
- 18. hold a certain body posture on a stable surface
- 19. duration of your activity
- 20. physical activity that is structured
Down
- 1. freezing of skin and body tissues
- 2. injury to ligament
- 3. bones move out of their normal position
- 4. helps heart rate return to normal
- 5. body unable to deal with heat environment
- 6. rapid change in body's momentum and direction
- 9. powering the body without use of oxygen
- 10. ability to continue performing
- 12. groups of repetitions followed by rest
- 15. brain chemicals released during activity
- 16. broken bone