The lungs recoil to force the air out of the lungs. The intercostal muscles relax, returning the chest wall to its original position. The diaphragm also relaxes, moving higher into the thoracic cavity.
Answer:
eat more meals at restaurants
Answer:
False
Explanation:
You could tear something or cause muscle damage.
If you ran in place for 20 minutes and stop every 5 mins then your heart rate will be in your target zone
