Both can be done, mainly depending on how you exercise. Exercise can be divided into aerobic exercise and anaerobic exercise. Aerobic exercise is running, dancing, cycling, swimming and skipping rope. Anaerobic exercise is muscle training, just like dumbbell training in the gym. If you only do aerobic exercise for a long time, you will lose weight but your skin will relax, because aerobic exercise perspires a lot and your body will be dry without water. If you only do anaerobic skin, it will be very tight and will produce muscle lines (of course, female muscle lines are different from strong men). Therefore, it is suggested that aerobic and anaerobic combination, fitness can achieve the goal, and dance can also achieve the goal if it is powerful and explosive.