A power measurement assembly mounted within an axle. In a specific example, the axle is a spindle that is interconnects the cranks of a bicycle, exercise, bicycle, or other fitness equipment. The power measurement assembly may include strain gauges connected with an appropriate circuit (e.g., Wheatstone bridge) that provides an output of the force on the axle by a rider pedaling the crank. In the case of an axle, the strain gauges measure the torsion due to the applied torque on the crank. The value is converted to a power value by a processor and that value is then wirelessly transmitted for display. The processor and/or the transmitter may be mounted within the axle. A separate power measurement assembly may be mounted on one of the cranks, which may include its own processor and transmitter or may take advantage of the processor and transmitter within the axle.

An adjustable rehabilitation and exercise device, including a rotary member rotatably mounted on a hub; a mount having a ring located adjacent to the rotary member with a lock selectively engageable with the rotary member to lock the ring at an angular position relative to the rotary member, and an arm connected to the ring and extending radially relative to the rotary member and having a movable carriage associated therewith to move radially relative to the rotary member and lockable to position the carriage at a radial position relative to the rotary member; and a patient engagement member connected to the mount and movable with the carriage.

An adjustable rehabilitation and exercise device, including a rotary member rotatable on a hub and having a plurality of elongated and spaced apart elongated mount receivers defined thereon; a mount selectively and movably positionable on a selected one of the mount receivers of the rotary member to select an angular location of the mount, the mount including a sliding member movably positionable along the selected mount receiver to a selected radial location along the selected mount receiver to select a radial location of the mount relative to the hub; and a patient engagement member connectable to the mount and movable with the mount.

An adjustable rehabilitation and exercise device, including a first rotary member rotatably mountable about a first hub and having a plurality of spaced apart and elongated first mount supports defined thereon; a first mount adjustably positioned on one of the first mount supports; a first patient engagement member attached to the first mount, a second rotary member rotatably mountable about a second hub the opposite the first rotary member, the second rotary member having a plurality of spaced apart and elongated second mount supports defined thereon; a second mount adjustably positioned on one of the second mount supports; and a second patient engagement member attached to the second mount. The first and second mounts are adjustably positionable on the first and second rotary members to enable adjustable positioning of the first and second patient engagement members radially relative to the first and second hubs of the rotary members and angularly relative to one another.

An adjustable rehabilitation and exercise device, including a rotary member having a plurality of elongated and spaced apart elongated open-ended slots defined thereon; a mount selectively and movably positionable on a selected one of the slots of the rotary member to select an angular location of the mount. The mount includes a sliding member movably positionable along the selected slot to a selected radial location along the selected slot to select a radial location of the mount relative to the hub of the rotary member. The mount has a slide member configured to slidingly engage the slot and a movable plunger located on the slide member, wherein the plunger is movable to engage the slot so as to lock the position of the mount along the slot; and a patient engagement member connectable to the mount and movable with the mount.

An adjustable rehabilitation and exercise device, including a rotary member rotatable about a hub and having an elongated slot defined thereon extending radially relative to the hub, the slot including a plurality of spaced apart and opposed fingers along the length of the slots, with a plurality of gaps defined between the fingers of each side of the slot; and a mount selectively and movably positionable on a selected location on the slot of the rotary member to select an angular location of the mount. The mount includes a sliding member movably positionable along the slot to a selected radial location along the selected slot to select a radial location of the mount relative to the hub of the rotary member. The sliding member is configured to slidingly engage the slot, the slide member having at least one spring loaded lock configured to engage one of the gaps to lock the position of the sliding member, and a key operable by a user to disengage the lock from the gap to enable the sliding member to be moved to another location along the slot. A patient engagement member is connectable to the mount and movable with the mount.

A rehabilitation and exercise device having patient engagement members on opposite sides of a rotary member. The device includes a motor connected to the rotary member by a clutch linked to the motor. The motor is configured to desirably rotate the rotary member so that the device may serve to move the feet/legs or other extremities of a patient through a range of motion, but do not require any application of muscle force by the patient. The clutch is also operable to disconnect the motor so that the only force applied to rotary member is the muscle force of the patient. The clutch is also advantageously operable to provide continuous passive motion and enable powered movement of a desired and adjustable amount provided by the motor, yet enable desired participation by the patient in application of muscle force.

An exercise device has guide links each having a first attachment point pivotally attached to an upper part of a frame. Foot support links each have a foot receiving area to support a user's foot and are pivotally connected to a second attachment point of one of the guide links so that when the guide links pivot relative to the frame, the foot support links move in a path of travel having a horizontal component of motion. A first and a second control pulley are each pivotally connected to a respective one of the guide links and offset from the first pivot axis so as to move in an arc. A first and a second flexible element each couple the vertical drive assembly to a respective one of the foot support links. Each flexible element has a midportion extending about a respective one of the control pulleys.

Aspects of the present disclosure relate to a gymnastic apparatus and method for cycling simulation having a transmission portion driven by pedals, through which a user may perform cycling training. The transmission portion may comprise a flywheel and a braking portion, which may apply a braking force to the flywheel. The apparatus may further comprise a control logic unit, through which training parameters may be set, and a sensor coupled to the control logic unit. The sensor may detect a signal relating to the torque acting on the flywheel and thereby send a signal to the control logic unit; the control logic unit may be configured to adjust the braking force of the braking portion applied to the flywheel, thereby adjusting the resistance to the pedals as a function of parameters set, as appropriate, and communicate information and adjust such changes via a feedback signal from the sensor.

Provided is a virtual reality indoor bicycle exercise system using a mobile device, which includes a cycle unit; a main controller controlling a load granted to the cycle unit and collecting information on various sensors attached to the cycle unit; a mobile device accessing the main controller to provide information such as physical exercise resistance, and the like and generated in an actual traveling path and receiving exercise information generated by various sensors from the main controller; and a main server wirelessly communicating with the mobile device and storing, updating and managing user information, exercise amount information, and the like.