The device is used to stimulate muscle congestion and swelling, and to grow muscles. If you really want to lose weight, you can do aerobic exercise, run for more than 50 minutes every day, and control your diet, which can achieve the effect of reducing fat. Swimming is the best, but see if you can swim as hard as you can. If you are running at a constant speed, it is also good to keep your heart rate around 145 for 50 minutes.