For most people, it is ok to do some low-intensity aerobic exercise on an empty stomach, such as jogging and cycling, but the training with a large amount of exercise is not ideal. Therefore, after a night's sleep, the muscle sugar level in the body is already very low, the strength will be thinner than usual, and the training intensity will be lower. In addition, if protein is not supplemented in advance, it will be too late for the body to repair muscles. If you want to do training in the morning, you should eat a nutritious breakfast early, preferably two hours ago, to prepare for your health.