Bad emotions due to mental stimuli can be let off by sports activities and also by diverting one's attention and regulating the balance of the human body. Various activities such as playing balls, walking, mountaineering, practicing Taijiquan and performing a sword dance can all divert or let off mental stress and discomfort. Especially, traditional physical training emphasizes the combination of movement with motionlessness, which can make the body comfortable and people happy. It is very effective for eliminating bad emotions. In addition, people may also take part in physical labor to get rid of mental tension, anger and grief with physical exercises.