Abstract: Exerciser for strengthening the grip of the hand and/or muscles of the forearm having a pair of handgrips or handles which are removably mounted on the arms of a helical torsion spring in a manner permitting the grips to be used interchangeably with springs having different strengths or resistances. The handgrips are fabricated at least in part of rubber or other rubberized material with longitudinally extending bores having resilient side walls configured for frictional engagement with spring arms of different diameters in a manner that permits rotational slippage of the handgrips about the spring arms and limits axial movement of the handgrips on the spring arms when the grip exerciser is in use and permits the handgrips to slide axially along the spring arms during installation and removal of the handgrips.

Abstract: Compression sleeve fabricated of a composite material that surrounds the joint to be supported and has a main layer of elastically stretchable material and at least one thin film of stretchable material which is laminated to the main layer and provides additional compressive forces that combine with compressive forces provided by the main layer in supporting a joint about which the sleeve is stretched. The material has a third layer which in some embodiments is a nylon jersey material, while in others it is another stretchable material that provides additional compressive forces and support.

Abstract: Exerciser for strengthening the grip of the hand and/or muscles of the forearm having a pair of handgrips or handles which are removably mounted on the arms of a helical torsion spring in a manner permitting the grips to be used interchangeably with springs having different strengths or resistances. The handgrips are fabricated at least in part of rubber or other rubberized material with longitudinally extending bores having resilient side walls configured for frictional engagement with spring arms of different diameters in a manner that permits rotational slippage of the handgrips about the spring arms and limits axial movement of the handgrips on the spring arms when the grip exerciser is in use and permits the handgrips to slide axially along the spring arms during installation and removal of the handgrips.

Abstract: Exerciser for strengthening the grip of the hand having a pair of handles which are removably mounted on the arms of a helical torsion spring in a manner permitting springs having different strengths or resistances to be used interchangeably with the handles. The handles can be constrained against rotation on the spring arms, allowed to rotate freely, or allowed to rotate to a limited degree, depending upon the needs of the user.

Abstract: Jump rope assembly comprising a rope, a handle at one end of the rope, an axially extending axle mounted in bearings within the handle for rotation about its axis, a gimbal head affixed to the axle at one end of the handle including a ring with a circular opening having an axis perpendicular to the axis of the axle, and a spherical ball of greater diameter than the opening pivotally seated against one side of the ring, with an end portion of the rope passing freely through the opening and being attached to the ball in a manner permitting the ball to pivot freely with respect to the axis of the opening as the gimbal head rotates about the axis of the axle.

Abstract: Jump rope assembly comprising a rope, a handle at one end of the rope, an axially extending axle mounted in bearings within the handle for rotation about its axis, a gimbal head affixed to the axle at one end of the handle including a ring with a circular opening having an axis perpendicular to the axis of the axle, and a spherical ball of greater diameter than the opening pivotally seated against one side of the ring, with an end portion of the rope passing freely through the opening and being attached to the ball in a manner permitting the ball to pivot freely with respect to the axis of the opening as the gimbal head rotates about the axis of the axle.

Abstract: Jump rope assembly comprising a rope, a handle at one end of the rope, an axially extending axle mounted in bearings within the handle for rotation about its axis, a gimbal head affixed to the axle at one end of the handle including a ring with a circular opening having an axis perpendicular to the axis of the axle, and a spherical ball of greater diameter than the opening pivotally seated against one side of the ring, with an end portion of the rope passing freely through the opening and being attached to the ball in a manner permitting the ball to pivot freely with respect to the axis of the opening as the gimbal head rotates about the axis of the axle.

Abstract: Exerciser for strengthening the grip of the hand having a pair of handles which are removably mounted on the arms of a helical torsion spring in a manner permitting springs having different strengths or resistances to be used interchangeably with the handles. The handles can be constrained against rotation on the spring arms, allowed to rotate freely, or allowed to rotate to a limited degree, depending upon the needs of the user.

Abstract: Jump rope assembly comprising a rope, a handle at one end of the rope, an axially extending axle mounted in bearings within the handle for rotation about its axis, a gimbal head affixed to the axle at one end of the handle including a ring with a circular opening having an axis perpendicular to the axis of the axle, and a spherical ball of greater diameter than the opening pivotally seated against one side of the ring, with an end portion of the rope passing freely through the opening and being attached to the ball in a manner permitting the ball to pivot freely with respect to the axis of the opening as the gimbal head rotates about the axis of the axle.