| A | B |
|---|
| contract | muscles shorten |
| skeletal muscles | muscles attached to bone |
| cardiac muscles | keep your heart pumping for life |
| smooth muscles | muscles that line the stomach that squeeze the food you eat |
| oxygen | muscles need this gas to work |
| muscle fatigue | When waste builds up in your cells faster than it can be cleared away |
| marathon | 26.2 mile race |
| training | prepares muscles to work longer and harder |
| proteins | muscles are mainly built of this |
| carbohydrates | supply the muscles with energy |
| fats | olive oil, butter and nuts |
| minerals | calcium, iron, magnesium, potassium |
| vitamins | necssary for your body to make energy |
