Treadmill

Abstract

A treadmill comprising an endless running surface extending between and movable around a plurality of rollers, and one or more protuberances protruding from the running surface.

What is claimed is:  
     
         1 . A treadmill comprising: 
 an endless running surface extending between and movable around a plurality of rollers; and    at least one protuberance protruding from said running surface.    
     
     
         2 . The treadmill according to  claim 1 , wherein said at least one protuberance protrudes from a foot-contacting side of said running surface.  
     
     
         3 . The treadmill according to  claim 1 , wherein said at least one protuberance protrudes from an underside of said running surface and forms a depression on a foot-contacting side of said running surface.  
     
     
         4 . The treadmill according to  claim 1 , further comprising a plurality of said protuberances protruding from said running surface.  
     
     
         5 . The treadmill according to  claim 4 , wherein said protuberances are arranged in a repeating pattern.  
     
     
         6 . The treadmill according to  claim 4 , wherein said protuberances are arranged in a non-repeating pattern.  
     
     
         7 . The treadmill according to  claim 4 , wherein at least two of said protuberances are of generally equal size.  
     
     
         8 . The treadmill according to  claim 4 , wherein at least two of said protuberances are of generally unequal size.  
     
     
         9 . The treadmill according to  claim 4 , wherein at least two of said protuberances are of generally equal shape.  
     
     
         10 . The treadmill according to  claim 4 , wherein at least two of said protuberances are of generally unequal shape.  
     
     
         11 . The treadmill according to  claim 1 , wherein said at least one protuberance is detachable and attachable to said running surface.  
     
     
         12 . The treadmill according to  claim 1 , wherein said at least one protuberance is adjustable in height with respect to said running surface.  
     
     
         13 . The treadmill according to  claim 1 , wherein said at least one protuberance is formed by a pusher element that selectively pushes against an underside of said running surface.  
     
     
         14 . The treadmill according to  claim 1 , further comprising a display operative to display a position of said at least one protuberance.  
     
     
         15 . The treadmill according to  claim 1 , further comprising a sensor operative to sense a position of said at least one protuberance.  
     
     
         16 . The treadmill according to  claim 1 , further comprising a controller operative to control an operation of said treadmill.  
     
     
         17 . The treadmill according to  claim 13 , wherein said pusher element comprises an inflatable pocket.  
     
     
         18 . The treadmill according to  claim 13 , wherein said pusher element comprises at least one first magnetic element which cooperates with at least one second magnetic element disposed on an underside of said running surface.  
     
     
         19 . The treadmill according to  claim 1 , wherein said running surface comprises a hollow bladder filled with a pourable material.