Across
- 2. This energy system doesn't require oxygen to work.
- 5. This happens to your heart rate when you start exercising.
- 6. This energy system requires you to use air.
- 7. The main component of this boyd system are your lungs.
- 9. W____________g is a good example of someone using the alactic energy system.
Down
- 1. This body system is made up of the heart, blood and blood vessels.
- 3. When muscles adapt to training they increase in size.
- 4. This builds up in the muscles when you don't get enough oxygen.
- 8. These types of athletes really on the aerobic energy system.
- 10. Micro tears in muscle ______ is an example of a short-term effect.