Across
- 2. continuous exercises that help your body process large amounts of oxygen efficiently
- 3. another name for your tailbone
- 4. the part of the bone where red blood cells are manufactured
- 6. help you to stand straight, but also allows you to bend
- 8. it is important to never bounce or jerk when doing this
- 9. muscles become this the more they are used
- 11. There are 206 of these in the human body
- 12. light exercises that send blood flowing to your muscles
- 13. helps protect your brain
Down
- 1. trained people who help others exercise their muscles
- 5. being 20% or more overweight is known as this
- 7. your body needs aerobic exercise for at least 20-30 minutes this many times a week
- 10. form a cage that protects your heart and lungs