why do our muscles gets tired

1. Who are the authors? Zoe Armstrong and Dave Armstrong 
2. Explain in your own words what is ‘muscle fatigue’? Muscles need energy or oxygen .
3. Why do you think our muscles get tired? When  you go on a Bush walk  
4. When do we need more oxygen? When you have lots of energy
5. What are some of the things we can do to overcome fatigue? Is When we exercise our body 
6. Use one of your favourite images to write something about muscle fatigue .