This is because exercise can help improve self-esteem and learn new skills. Additionally, it "may improve the way the body handles stress through its effect on neurotransmitters associated with mood enhancement," as described on page 334 of the text. While reading this section of the book, I immediately thought of endorphins and other chemicals that the body releases when it engages in increased physical activity. Personally, I can claim to feel mentally healthy and at peace after exercise. Activities such as yoga particularly support putting the mind and body at ease and reducing stress