There are many kinds of treadmills, and the height can also be adjusted. You'd better run first, and then walk when you are tired. You can take the slope. It can last for 60 minutes and consume more than 700 and 7000 kilometers of heat. Be sure to control your diet. It is no problem to lose weight about 5 times a week. Running will build calf muscles. Don't run too fast, don't run for too long on a slope, but jogging on a zero slope takes a long time.