waight loss Posted on 26 November 2014 at 11:01 Another way for underweight people to gain weight is by exercising. Muscle hypertrophy increases body mass. Weight lifting exercises are effective in helping to improve muscle tone as well as helping with weight gain.[18] Weight lifting has also been shown to improve bone mineral density,[19] for which underweight people have an increased risk of deficiency.[20] Exercise itself is catabolic, which results in a brief reduction in mass. The gain in weight that can result of it comes from the anabolic overcompensation when the body recovers and overcompensates via muscle hypertrophy. This can happen by an increase in the muscle proteins, or through enhanced storage of glycogen in muscles. Exercise can help stimulate a person's appetite if they are not inclined to eat.