I think if you want to lose weight, vest line and leg exercise should be carried out at the same time, and you must do aerobic exercise, so as to achieve the goal of overall weight loss. The vest line needs special abdominal exercises, and leg exercises need stretching exercises. So fat reduction can be done at the same time, and the rest can only be done separately. If it were me, I would definitely lose weight first, then practice the vest line and finally practice my legs.