It strengthens the heart and lungs and reduces the negative effects of stress and emotional strain. Young and middle-aged people should do some kind of aerobic activity at least three times per week. Resistance Training Resistance training refers to lifting or pushing against something heavy or difficult to move. Resistance training builds physical strength. It also converts fat into muscle.
Muscle burns more calories than does adipose or fatty tissue.
When one reaches 40 years of age, one's metabolism naturally slows down with the decline of organ functions. Practically speaking, this results in gaining approximately 10 pounds every decade after that age unless one takes preventive steps. After 40, one will gain weight even if one eats the same amounts and kinds of foods and gets the same amount of exercise they did before that age. In other words, in order to counteract this process, one has to do more than they did before. Not only will this result in a slimmer, trimmer body, but one will also feel mentally and emotionally good about their renewed physical strength.