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Shadowboxing is a combat sport exercise in which a person throws punches at the air as though there is an opponent.[1] Practised primarily in boxing, it is used mainly to prepare the muscles before the person training engages in stronger physical activity.[2] 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.[3]