A machine for training football players and wrestlers comprises a rigid U-shaped support frame (12a, 12b, 14) which supports vertical struts (22a, 22b). A crossbeam carrying a dummy (39) slides either in vertical guides (24a, 24b) or in inclined guides (26a, 26b) which have switchable cams. These cams...http://www.google.de/patents/US4688792?utm_source=gb-gplus-sharePatent US4688792 - Training and exercising machine for football and wrestling
