根据以下指示，编辑该段落的语法和结构，使其更加清晰和易于理解。


While studies show that regular exercise can have numerous benefits, such as reducing the risk of heart disease and improving mental health, it is also important to note that over-exercising can lead to injury or fatigue which can do more harm than good.
Regular exercise has many benefits, such as reducing the risk of heart disease and improving mental health. However, it is important to note that over-exercising can lead to injury or fatigue, which can do more harm than good.