Go on youtube and search: BaduanJin <--- it's an ancient health exercise from Shaolin, it helps to restore balance to the endocrine system.
Also search for: Wudang 5 Animal Qigong <--- same benefits, my friend learned the legitimate form when he stayed in Mt.Wudang for a summer. He felt totally vibrant afterwards after doing it for a month , like brand new person filled with energy.