Sciamachy

Shadowboxing is a combat sport exercise in which a person throws punches at the air as though there is an opponent. Practised primarily in boxing, it is used mainly to prepare the muscles before the person training engages in stronger physical activity. Muhammad Ali once performed a now famous shadowboxing routine next to Howard Cosell for ABC's Wide World of Sports television cameras. Black Nova Scotian boxer George Dixon is widely credited for developing the technique.