编辑给定的英语文章，使其更加连贯和易读。
原文: 
The reason why people should exercise is because it is good for their health. When people exercise, their bodies release endorphins, which are chemicals that make them feel happy. Exercise also helps people control their weight and improves their sleep. Therefore, people who exercise regularly are less likely to develop health problems such as obesity and insomnia.
Regular exercise benefits people's health by releasing endorphins, which are chemicals that improve mood, aiding weight control, and enhancing sleep quality, thus reducing the risk of health issues such as obesity and insomnia.