Qi Gong is an ancient Chinese practice based on relaxation movements, posture and breathing in order to harmonize the body and mind. This practice improves the general state by reducing fatigue and improving sleep. The beneficial effect of Qi Gong in medicine has been studied in several diseases including cancer, diabetes, arterial hypertension and fibromyalgia. Qi Gong seems interesting in depressed patients but also to reduce stress in healthy subjects.