Eat less but weight gain reasons to consider there are high-calorie eating, lack of exercise two, as follows: First, high-calorie eating: although eating less, but eating some greasy food, like fried food, etc., these foods, although eating less, but contains high calories, easy to accumulate fat in the body, resulting in weight gain. Second, the lack of exercise: although eating less, but not a good exercise exercise, eat to the body’s calories can not be well consumed, will also lead to weight gain. When there is less to eat but weight gain, pay attention to improve eating habits, and strengthen exercise, so as to achieve the purpose of weight loss, weight maintenance, and usually need to drink more water to increase the body’s metabolism.