Exercise also increases bone density, which helps prevent osteoporosis, the condition in which bones lose density, weaken, and become porous and very fragile. Exercise helps prevent cancer. Exercise speeds digested food through the colon, denying it the opportunity to sit in one place and ferment and cause irritations that can bloom into cancer. Exercise lowers risks of endometrial and breast cancers by reducing body fat, which produces estrogen, a female hormone that facilitates the growth of some female cancers. Exercise enhances your emotional well-being.
Most people feel calm and have a sense of well-being after they exercise.
Any anxieties they had before exercising are tempered or even gone. They feel better about themselves, less tired, more productive at work, and more interested in sex. There seems to be a chemical reason behind these emotional benefits. Exercise, according to one theory, releases beta-endorphin, a natural substance in the body that is hundreds of times more potent than morphine. This begins to occur just 12 minutes into a workout.