Asymmetric roll out training device for anterolateral abdominal muscles

Abstract

The present invention relates to an advanced training device to target abdominal muscles by enabling asymmetric roll out exercise routines. The fitness industry continues to evolve, with a growing emphasis on core strengthening exercises. Abdominal rollers have been widely used for abdominal workouts, but there is a need for exercise routines that safely and effectively activate specific muscles unilaterally, in particular rectus abdominus muscles, external oblique muscles and internal oblique muscles. The present invention offers a stable and unique training device for asymmetric roll out exercise routines along a defined circular path of roll out with a high level of control for the user to effectively target abdominal muscles unilaterally.

1 . A training device for asymmetric training of abdominal muscles, comprising
 a handle arrangement, with a first grip zone for one hand of a user and a second grip zone for another hand of the same user, and   a rolling arrangement, comprising:   a first end and a second end on a distance of each other along a roll axis, at least one approximate axisymmetric element allowing the rolling arrangement to have a rolling contact with a flat rolling surface at a tread area when the training device rolls during use under load over the flat rolling surface,   wherein the tread area, comprises:
 a first tread edge with a first tread diameter near the first end, and 
 a second tread edge with a second diameter near the second end, 
 the handle arrangement rotatably connected to the rolling arrangement to rotate relative to the rolling arrangement about the roll axis, wherein, the first tread edge is configured to rotate approximately synchronized with the second tread edge; and 
 the first tread diameter is larger than the second tread diameter. 
   
     
     
         2 . Training device according to  claim 1 , wherein,
 the at least one approximate axisymmetric element comprises a first wheel;   and   the rolling arrangement further comprising a further approximate axisymmetric element comprising a second wheel, wherein,   the first wheel comprises the first tread edge; and   the second wheel comprises the second tread edge.   
     
     
         3 . Training device according to  claim 2 , wherein,
 the rolling arrangement further comprises at least one fixing element to rotationally fix the first tread edge and the second tread edge to each other such that the said tread edges of the rolling arrangement in a rolling contact with the flat rolling surface during use under load rotate synchronized.   
     
     
         4 . Training device according to  claim 3 , wherein the at least one fixing element is configured to rotationally fix the first tread edge and the second tread edge directly or indirectly to each other to synchronize rotation. 
     
     
         5 . Training device according to  claim 3 , further comprising an axle element with a first axle end and a second axle end;
 wherein,   the at least one fixing element is configured to connect the first wheel to the first axle end and the second wheel to the second axle end such that the wheels rotate about the roll axis approximately in unison.   
     
     
         6 . Training device according to  claim 5 , wherein,
 the at least one fixing element is configured to rotationally fix the wheels to the axle element.   
     
     
         7 . Training device according to  claim 1 , wherein the handle arrangement is rotationally free about the roll axis. 
     
     
         8 . Training device according to  claim 1 , wherein,
 the first grip zone is substantially closer to the first tread edge than the second grip zone and the second grip zone is substantially closer to the second tread edge than the first grip zone.   
     
     
         9 . Training device according to  claim 1 , comprising:
 a center point, the center point traveling along a circular path projected on the flat rolling surface with a radius when the training device rolls during use under load over the flat rolling surface, wherein the center point is on the roll axis halfway between the first tread edge and the second tread edge.   
     
     
         10 . Training device according to  claim 9 ,
 wherein the radius of the circular path during use is between 80 cm and 500 cm.   
     
     
         11 . Training device according to  claim 1 , comprising:
 An axisymmetric element made of metal and   an axisymmetric element made of plastic,   one of said axisymmetric elements being part of the rolling arrangement; and   the other of said axisymmetric elements being part of the handle arrangement, wherein,   the metal axisymmetric element is positioned inside the plastic axisymmetric element to form a revolute joint.   
     
     
         12 . Training device according to  claim 1 , wherein,
 the tread edges are of a high-friction material.   
     
     
         13 . Training device according to  claim 2 , wherein
 the wheels comprise tires with a high-friction tread.   
     
     
         14 . Training device for asymmetric training of abdominal muscles, comprising:
 a longitudinally extending rolling arrangement with at least one axisymmetric element having a tread area and configured to roll over a support surface at the tread area,   wherein the tread area has a first tread edge with a first tread diameter and a second tread edge with a second tread diameter wherein the first tread edge and the second tread edge are at a distance from each other; and   further comprising a handle arrangement with a first grip zone and a second grip zone to be held by respective hands of a user; wherein the handle arrangement is rotationally mounted to the rolling arrangement, such that, during use, the rolling arrangement moves over the support surface with respect to the handle arrangement; and   wherein the first tread diameter is larger than the second tread diameter; and further comprising a fixing element to fixedly arrange the first tread edge and the second tread edge with respect to each other such that they roll in unison.