Exercise device and associated methods

A method of fatiguing one or more target muscle groups of a user using an exercise device, comprising:

• grasping in each hand one of a pair of outer handles of an exercise device, each of the pair of outer handles being connected to at least one tether, the at least one tether being one or both of a pair of tethers extending through a pair of orifices formed in a central disk suspended between the outer handles;
• bending one or more of the user's legs while maintaining the user's spine in a substantially straight orientation;
• positioning each hand in an initial position relative to the user's torso;
• rotating one or both of the user's hands grasping the outer handles to cause the central disk to rotate to thereby cause the pair of tethers to twist about one another;
• and
• cyclically pulling the outer handles away from one another in a cyclic motion to apply a cyclic pulling force to the tethers to cause the central disk to alternately rotate in opposing directions of rotation, the cyclic motion thereby applying a cyclic force to an initial target muscle group of the user to thereby fatigue the target muscle group.

A method of fatiguing one or more target muscle groups of a user using an exercise device, comprising:

• grasping in each hand one of a pair of outer handles of an exercise device, each of the pair of outer handles being connected to at least one tether, the at least one tether being one or both of a pair of tethers extending through a pair of orifices formed in a central disk suspended between the outer handles;
• positioning the user's torso in a prone position on a floor or ground surface;
• positioning each hand in an initial position relative to the user's torso;
• rotating one or both of the user's hands grasping the outer handles to cause the central disk to rotate to thereby cause the pair of tethers to twist about one another;
• and
• cyclically pulling the outer handles away from one another in a cyclic motion to apply a cyclic pulling force to the tethers to cause the central disk to alternately rotate in opposing directions of rotation, the cyclic motion thereby applying a cyclic force to an initial target muscle group of the user to thereby fatigue the target muscle group.