A knee pain reduction strap device is described. The device is configured to be used by a user alone who is experiencing knee pain. A primary strap is configured to be placed beneath the arch of the foot while a secondary strap, disposed atop the primary strap, helps to provide additional friction, and ensure that the device remains in position. Handles disposed on ends of the primary strap facilitate manipulation of the device by the user while in a sitting position to perform stretches of the ankle, calf, shin, and knee of the user, helping to alleviate pain over time.

An exercise apparatus with an adjustable rotating element around which a force transferring material wraps either clockwise or counterclockwise to provide bidirectional rotational resistance for exercising. The force transferring material is preferably guided to remain in close proximity to the rotating element while wrapping around the rotating element.

An exercise bar assembly includes a pair of rotating grip assemblies, each including a generally planar frame and a hand grip mounted within the frame for rotation within in the plane of the frame. The rotating grip assemblies are attachable to opposite ends of a center bar assembly along the longitudinal axis of the bar assembly. A plate bar assembly is attachable to each of the rotating grip assemblies opposite the center rod, with the plate bar assembly aligned with the longitudinal axis to form a weight lifting bar. A user-selectable elastic band is engageable between the pair of rotating grip assemblies along the longitudinal axis so that the elastic band resists rotation of each hand grip in each of the rotating grip assemblies. The rotating grip assemblies of the exercise bar assembly allow for the full range of motion of the bicep, and the elastic band creates a resistance exercise through the bicep's full range of motion.

Methods and systems for controlling a force generator of an exercise apparatus are described wherein the method comprises determining or receiving angular positions of a rotatable axle of an exercise apparatus when a force is applied to a force receiving structure of the exercise apparatus, the rotatable axle being part of a mechanical power transmission system connecting the force receiving structure via the rotatable axis to a force generator which is controlled by a computer based on a kinematic model, the kinetic model representing equations of motion of the exercise the apparatus; determining or retrieving first geometrical scaling values associated with the angular positions and incorporating the first geometrical scaling values into the kinematic model to form a first modified kinematic model, the first geometrical scaling values being associated with a non- circular gear of a first predetermined non-circular geometry; and, determining applied force values for the angular positions, each applied force value representing a force that is applied to the force receiving structure; and, controlling the force generator based on first resistive force values to mimic an exercise apparatus comprising a mechanical power transmission system including the first non-circular gear, the first resistive force values being computed using the first modified kinematic model and the applied force values.

A symmetric upright rotating disc exercise machine includes a base unit and two upright rotating disc units. Each upright rotating disc unit includes a rotating shaft, an upright disc, and a grip. The rotating shaft is pivotally connected to the base unit in a horizontal direction. The upright disc is mounted to the rotating shaft. The upright discs of the two upright rotating disc units are arranged to face each other. The two upright rotating disc units are separated from each other by a distance in the horizontal direction to form an operation space. The grip is mounted to the upright disc and located in the operation space.

An exercise machine for working core muscles includes a base, a handle bar connected to the base, and a leg support assembly connected to the base and extending substantially horizontally in a direction away from the handle bar. When one of the handle bar and leg support assembly is swung in a clockwise direction, the other of the handle bar and leg support assembly is swung in a counterclockwise direction, and when the one of handle bar and leg support assembly is swung in a counterclockwise direction, the other of the handle bar and leg support assembly is swung in a clockwise direction. The opposite direction rotations of the handle bar and leg support assembly create a double twist motion in the core muscles of a user of the machine.

A handheld resistance exercise device is contemplated for exercise, rehabilitation, warm-up and the like, which provides resistance to muscles, tendons, joints, and fasciae in the upper body and lower back as it is actuated by a user standing a distance away from a vertical surface that is engaged with the device. Actuation thereof by the user in performing various exercise protocols provides stability for one or more muscles of the hand, elbow, shoulder girdle, shoulder blade, rib cage, as well as the inner core muscles, while also providing improved mobility for one or more of the wrist, forearm, elbow, shoulder joint, and muscles that rotate and bend the spine sideways.

An upper-limb rehabilitation assisting device includes first and second handles coupled to first and second rotating shafts and rotationally operated by hands on a paralytic limb side and a healthy limb side; first and second biosignal detecting parts that detect first and second biosignals corresponding to the paralytic limb side and the healthy limb side; first and second drive parts that drive the first and second rotating shafts; and a control part that performs a cooperative control of the first rotating shaft and the second rotating shaft. The control part controls the torques of the first and second drive parts at the time of the cooperative control of the first and second rotating shafts the basis of the degree of cooperation between the first and second biosignals.

A hockey training apparatus may comprise a backrest that may be interchangeable with a seat. The backrest may support the back of a user during use. A harness may comprising one or two straps connected to the backrest and be used to encircle the waist of the user. The user may pedal and practice puck stickhandling techniques that include moving the puck in front of the frame between a right side and a left side of the hockey training apparatus. The frame of the hockey training apparatus may comprise a back section in contact with a floor and a backrest tube for mounting and supporting a backrest post of the adjustable backrest. The frame may also have a middle section for mounting and supporting the crankset, pedals and axle and a front section in contact with the floor, but preferably without any handles or other structures in front of the user that would interfere with side to side movement of a hockey stick by the user.

Exercise apparatuses are described. An example exercise apparatus has a lengthwise axis and includes a first shaft, a first frame, a first handle, a second frame, and a second handle. The first shaft has a first shaft first end and a first shaft second end. The first frame is attached to the first shaft first end and defines a first frame passageway. The first handle is disposed within the first frame passageway such that the first handle can translate along the lengthwise axis and rotate within the first frame passageway. The second frame is attached to the first shaft second end and defines a second frame passageway. The second handle is disposed within the second frame passageway such that the second handle can translate along the lengthwise axis and rotate within the second frame passageway.