FIELD: sportive equipment, in particular, equipment for creating force in muscle working devices. SUBSTANCE: apparatus has rotary member formed as shaped collar with arced working surface. Radii R1 and R2 defining collar configuration have different values. Cable pulley is running about rotary member, which is connected to shaft and replaceable actuating mechanisms. Fastening members are separated from axis of rotation by spaces of different sizes. One end of cable pulley tie-rod is connected to related fastening member and other end is connected to actuating mechanism. Roller is mounted for free displacement over arced working surface of rotary member. EFFECT: increased efficiency, simplified construction and convenient usage. 4 cl, 7 dwg
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