Exercise increases the release of this hormone, which is responsible for
feelings of happiness and well-being.

Endorphins

Explanation:

Endorphins are responsible for feelings of happiness and well-being.

1. breathe deeply from your lower lungs

2. breathe in and try to push the ring outwards.

3. breathe in through your nose and out through your nose and mouth.

4. avoid raising your shoulders as you breathe in

5. relax!

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relationship between pressure and air volume and led to the understanding of how respiration works; i believe this is the correct answer ; /// good luck