Does Mastrbation Cause Weight Loss? While it is a physical activity, the amount of energy expended during masturbation is minimal compared to other forms of exercise like running, swimming, or weight training. While it may contribute to a very slight increase in calorie expenditure, it is not enough to lead to noticeable weight loss on its own. While masturbation itself doesn’t cause weight loss, it may contribute to overall well-being, potentially improving mood and reducing stress, which might help some individuals maintain a healthy lifestyle or avoid stress-related overeating. A healthy diet, adequate sleep, and regular physical activity are the key factors in losing weight, not masturbation.