Why do our muscles get tired?

https://flipgrid.com/332547

Password: LS1isthebest

LI: to self monitor understanding of words and phrases.

LI: to research the meaning of unknown words and phrases.

This week for reading we had to read a book called: Why do our muscles get tired? This book is about muscles.

This book is also about how they get tired, Do they get tired and why do our muscles get tired. Then we had to make a Flipgrid video telling them what the book is about and 3 words you didn't understand in the book. You have to say in your video what 3 words you didn't understand and what do they mean.