A golf club head includes a body having an outer surface with a recessed channel formed therein. A weight assembly that includes a weight at least partially disposed within the recessed channel, a cover extending over the recessed channel, and a fastener coupling the cover to the body. The fastener is adapted to retain the weight in the recessed channel only indirectly by the cover. The weight assembly is selectively positionable between at least three configurations: a first configuration where the weight is secured within the recessed channel; a second configuration where the weight is slidable within the recessed channel; and a third configuration where the weight is completely removable from the golf club head. The cover is coupled to the body in all three configurations.

A running device and method of using the device are disclosed. The device may include a moveable material within an inner chamber of the running device's housing. In operation, a running device may be held in each hand and the runner may thrust both hands downward prior to landing and quickly bring the devices to a vertical stop after landing. Bringing the devices to a vertical stop may cause the moveable material to collide with the housing and increase the force exerted by the runner on the ground. A delay component may delay the peak force exerted by the material against the housing so that the translation of that force to the ground coincides with the peak force that the runner would have exerted against the ground in the absence of the devices.

An exercise ball may provide two independent sections, a first separable section and a second separable section, that a user may utilize for weight training and mind-body exercises. The first separable section and the second separable section may be held by a user in opposite hands for weight training and other exercises. The exercise ball may be a Tai Chi ball that may include a plurality of polymagnets provided in an interior of the exercise ball that may keep the two separable sections together. The plurality of polymagnets may provide a push-release or twist-release attachment and detachment to attach and detach the sections.

A baseball or softball bat having a sound generator disposed therein. A resilient member retains a knocker in relation to an inner surface of the bat when the sound generator is in an inactive, at-rest state. Upon an impact of the barrel with an object, the resilient member flexes or is deformed causing the knocker to strike an inner surface of the bat and generate a simulated bat impact sound.

A martial arts training system comprising: (a) one or more hand held targets; (b) one or more wearable devices; and (c) trainee log-in hardware installed in said target(s) and said wearable device(s).

A golf training aid may appear to take the form of a golf club, sometimes without a club head. At a proximal end, or end near the golfer, the training aid may comprise a standard golf grip attached to a carbon fiber cylinder portion, the cylinder portion containing a magnet, with a rubber seat disposed upon the magnet. A metallic ball bearing may be in magnetic attachment the magnet. A plurality of additional ball bearings, smaller than the metallic ball bearing, may be magnetically retained and distal to metallic ball bearing. The ball bearings may be disposed within a laminated polycarbonate tube. A far end or distal end of the training aid may comprise a rubber plug to contain ball bearings that have traveled down the tube, optional weights and a magnetic end cap.

A low friction rehabilitation board having an integral band retaining feature is described. The rehabilitation board may have a coefficient of static friction of no more than about 0.5 and in some embodiments no more than about 0.06. The rehabilitation board has a plurality of band retaining feature configured along one or both ends and may be an integral band retaining features being formed in the board. Additionally, the rehabilitation may include one or more band retaining features on one or both sides of the board. The unique configuration of the band retaining features enables rehabilitation method heretofore not possible with a single board. Resistance bands may be retained in the band retaining features and coupled to a user's limb, such as a foot or ankle, to resist motion, such as sliding or extending the foot along the low friction surface of the rehabilitation board.

A treadmill may include a platform, at least one pulley attached to the platform, a sliding surface of the platform, a tread belt riding portion of the sliding surface, a tread belt surrounding the pulley and the sliding surface, the tread belt having at least one side edge, and a belt guide incorporated into the platform. The belt guide includes a textured portion of the sliding surface aligned with the side edge of the tread belt and spaced apart therefrom when the tread belt is positioned entirely within the tread belt riding portion. When the textured portion comes into contact the tread belt from the tread belt being misaligned out of the tread belt riding portion, the tread belt and the textured portion collectively produce a misalignment sound audible to a user when the tread belt moves against the sliding surface.

An exercise machine carriage handle system for providing handles for an exerciser to grasp with their hands thereby expanding the type of exercises that may be performed. The exercise machine carriage handle system generally includes a frame having a track, a carriage movably connected to the track, a bias member connected between the frame and the carriage, a first handle connected to the carriage near the first side, and a second handle connected to the carriage near the second side. The first handle and second handle are adapted for grasping with a first hand and a second hand respectively of a user during the performance of an exercise on the exercise machine.

A golf club head includes a body having an outer surface with a recessed channel formed therein. A weight assembly that includes a weight at least partially disposed within the recessed channel, a cover extending over the recessed channel, and a fastener coupling the cover to the body. The fastener is adapted to retain the weight in the recessed channel only indirectly by the cover. The weight assembly is positionable in an unlocked configuration and a locked configuration. When the weight assembly is in the unlocked configuration, the cover is lifted out of the recessed channel and the weight is selectively slidable within the recessed channel. When the weight assembly is in the locked configuration, the cover is disposed within the recessed channel and the weight is secured within the recessed channel. The weight assembly is coupled to the body in both the unlocked configuration and the locked configuration.