Counter-force system for eccentric exercise equipment

Abstract

Counter-force system for eccentric exercise equipment, comprising an operating system for weight-training equipment ( 1 ), wherein the initial movement of the pedal or hand bar ( 2 ) of the physical-exercise equipment ( 5 ) is performed without effort on the part of the user and upon reaching a specific position of the travel thereof the system then automatically exerts force in the opposite direction in order to return the pedal or hand bar to the initial position thereof.

1 - 6 . (canceled) 
     
     
         7 . A counter-force system for eccentric exercise equipment comprising a muscle-building equipment ( 1 ) comprising:
 a moveable rod ( 4 );   a piston ( 3 ) having a defined piston stroke; and   at least one of a pedal or a hand bar ( 2 ) that actuates along the moveable rod ( 4 ) in response to the defined piston stroke,   wherein an adjustable force is configured to return the piston ( 3 ) to a starting position upon reaching an end of the defined piston stroke via adjustment of the force.   
     
     
         8 . A counter-force system for eccentric exercise equipment according to  claim 7 , wherein:
 the piston ( 3 ) freely moves with the moveable rod ( 4 ) in a first direction and carries out a return in a second direction automatically upon reaching the end of the defined piston stroke; and   during the return in the second direction, the force is adjusted.   
     
     
         9 . A counter-force system for eccentric exercise equipment according to  claim 7 , wherein the piston ( 3 ) is a pneumatic cylinder. 
     
     
         10 . A counter-force system for eccentric exercise equipment according to  claim 7 , wherein the piston ( 3 ) is a hydraulic cylinder. 
     
     
         11 . A counter-force system for eccentric exercise equipment according to  claim 7 , wherein the piston ( 3 ) is an electrically-operated piston.