Why Weight Training? : Reason # 1

Weight training is the best way to maintain your muscle in a caloric deficit

Anytime you reduce your calories, you run the risk of losing lean body mass along with the fat. The more you cut calories and the longer you stay on a reduced calorie diet, the greater the risk. Without weight training, your body can easily get a large proportion of its energy needs by cannibalizing muscle. Adding resistance training, with weights or with body-weight resistance, will help you maintain your muscle when your calories are low.