VOICE TWO: Physical activity is also known to increase the release of endorphins. These chemicals reduce feelings of pain. They also help people feel more happy and peaceful.
 
There is some debate about exactly what causes the brain to release endorphins. Some experts believe it is the act of exercising itself. Others say it is the feeling one gets from having met an exercise goal.
 
Either way, the two things work together when it comes to improving one’s emotional health.

朗读练习(coming soon)：




原读：