Me too. We are all ectoderms, so we don't need to do much aerobic exercise. Just warming up and running. Basketball, football and other strong aerobic exercises should not be too much. In addition, the criterion of heavy weight and low frequency should be selected during training, and the movement displacement should be long and slow. Don't masturbate too much, you won't have the energy to train. Besides, you can also try your own weight-bearing training and read the book Prisoner's Fitness.