CPC A63B 21/023 (2013.01) [A63B 21/00061 (2013.01); A63B 21/00065 (2013.01); A63B 21/025 (2013.01); A63B 21/153 (2013.01); A63B 2071/0072 (2013.01); A63B 2071/065 (2013.01)] | 15 Claims |
1. An apparatus for providing a substantially constant level of resistance, the apparatus comprising:
a first resistance module configured to provide a substantially constant force resistance at a first resistance level, wherein:
the first resistance module includes a first coupling component, a first drum, and a first constant-force spring having the first resistance level;
a first end of the first constant-force spring is connected to the first drum;
a first rear drum, wherein a second end of the first constant-force spring is connected to the first rear drum; and
wherein the first resistance module is configured to couple to a second resistance module via the first coupling component, wherein the first coupling component comprises a set of teeth, the set of teeth configured to couple to a set of holes on the second resistance module.
|