The following are possible reasons for insomnia when working out: First, insomnia when working out may be caused by excessive exercise, overexertion, and overexcitation of brain cells. It is suggested that patients should pay attention to avoid over-exercising and carry out some gentle and soothing exercises. The amount of exercise needs to be gradual and gradually increased. Second, a fitness insomnia, it is possible that the patient itself is a neurasthenia, extreme weakness of the population, such people may not be suitable to go to the gym for a relatively large number of sports. It is recommended to rest quietly, if you must exercise, generally walking or jogging.