In fact, it is best to go to the gym in the afternoon, because people have the best flexibility at this time and are not easy to strain. If you want to exercise in the morning, you can go running in the park. Running is a full-body exercise! ! ! If you want to exercise every day, exercise different parts, such as exercising your arms today and exercising your legs tomorrow, so as not to burden your muscles. However, secondly, it is enough to exercise once a day, and each time is only 1.5 -2 hours, and you are only 16 years old, so it is best not to exercise for more than 2 hours. I have no time to go to the gym, and it's cold now. Buy a treadmill from a good home website and put it at home.