OtterKnow Kids EncyclopediaHave you ever noticed that your heart beats faster when you run or play hard? Your body does some amazing things when you exercise! Your body is like a machine that works harder when you are being active.
When you exercise, your heart pumps more blood to carry energy to your muscles. You also breathe harder so your lungs can take in extra air. You might notice that you start to sweat — that is your body’s way of cooling itself down, kind of like how a fan cools you off on a hot day.
Your muscles get warm and tired because they are working so hard, and that is totally normal! All of these things are signs that your body is getting a good workout. The more you exercise, the stronger your heart, lungs, and muscles become.
- Your heart beats about 100,000 times every single day!
- When you exercise hard, your heart can beat twice as fast as when you are resting.
- Sweat is mostly made of water, and on a really hot day you can sweat enough to fill a whole water bottle!
