M.D. Hardly anyone disputes the merits of exercise. People who use their various muscles repetitively lead longer, healthier, happier lives.
Health is improved in many ways, but especially by decreasing obesity and heart disease.
Regular exercisers are generally happier and calmer due to the release of pleasure-producing chemicals in the brain known as endorphins. Most people realize that exercise is healthful but they don't do it. Obesity and couch potatoism are actually increasing worldwide. Television, computers, and modern conveniences like the automobile bear part of the blame. Also, busy students, jobholders, and parents don't feel they can spare the time for workouts.