Across
- 4. your tailbone.
- 5. helps you stand straight and allow you to bend.
- 7. When ____, never bounce or jerk.
- 8. Muscles become ___ the more you use them.
- 11. Continuous exercises that help your body process large amounts of oxygen efficiently.
- 12. There are 206 ______ in the body.
- 13. protects your brain.
Down
- 1. _____ therapists are trained people who help exercise muscles.
- 2. light exercises that send blood flowing to your muscles.
- 3. Overweight by 20% or more.
- 6. Your body need aerobic exercise ____ times per week.
- 9. form a cage that protects your heart and lungs.
- 10. The part of the bone where red blood cells are made.