A golf club head comprises a sole, a recessed sole port in the sole; and a rotatably adjustable sole piece adapted to be at least partially received within the sole port and comprising a central body having a plurality of contact surfaces adapted to contact the sole port and being offset from each other along a central axis extending through the central body of the sole piece. The sole piece can be positioned at least partially within the sole port at five or more rotational and axial positions with respect to the central axis, wherein at each rotational position, at least one of said contact surfaces of the central body contacts the sole port to set the axial position of the sole piece. The sole port and/or the sole piece can be generally pentagonal in shape.

A new golf putting device incorporates a concave ramp turf surface having a set of golf putting receptacles and a corresponding set of golf putting receptacle plugs, and a set of distance indicia corresponding to the set of golf putting receptacles. Each golf putting receptacle plug includes a body portion and a turf layer. The receptacle's turf layer forms a part of the ramp turf surface and smoothly transitions into the ramp turf surface. The golf putting device also includes a frame structure and a ramp layer attached to the frame structure. The ramp turf is attached to the ramp layer. The golf putting device also includes a set of rails on the two sides of the ramp turf surface. The golf putting device further includes a set of target zone indicia on the ramp turf surface.

A fitness equipment control system is provided. The system includes a receiver and a mobile apparatus, and performs the operations: generating a first control signal based on a training course of a user; transmitting the first control signal to the receiver to make the receiver generates a signal which is readable by the fitness equipment according to the first control signal and transmit the readable signal to the fitness equipment; receiving at least one physiological signal from at least one of the wearable devices worn by the user; based on the training course and the at least one physiological signal, generating a second control signal; and when the second control signal is generated, transmitting the second control signal to the receiver, wherein the receiver generates a signal which is readable by the fitness equipment according to the second control signal and transmits it to the fitness equipment.

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 golf club head includes a body having a recessed channel formed in the outer surface. A weight assembly that includes a weight disposed within the recessed channel and a cover extending over the recessed channel. A shelf is defined in the cover and slidably receives the weight. The weight assembly also includes 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 cover is positionable in an unlocked configuration whereby the cover is raised at least partially out of the recessed channel and the weight is slidable within the shelf and the recessed channel, and a locked configuration whereby the cover is disposed within the recessed channel and the weight is secured within the recessed channel and the shelf. The weight moves with the cover between the unlocked configuration and the locked configuration.

A wrist-training device for a golf swing is an apparatus that trains a golfer of a consistent proper golf swing form. The apparatus includes a housing, a trigger assembly, and a click-alert assembly. The housing contains the trigger assembly and the click-alert assembly. The housing is wearable as the apparatus includes a length-adjustable strap. The length-adjustable strap wraps around the wrist. A first loop and a second loop connect the length-adjustable strap around the housing. The trigger assembly activates the click-alert assembly. The click-alert assembly notifies the user of proper form with a sound. The trigger assembly includes an actuation plate and a release lever. The click-alert assembly includes a striking latch, a first magnet, and a second magnet. The actuation plate is pressed by the hand, and the release lever is engaged. The release lever releases the striking latch, allowing the first magnet to snap with the second magnet.

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.

Disclosed is system and method for measuring the tension of a tennis net, and, alternatively or in addition, for determining if a service let occurs via the measuring of the net tension. The disclosed embodiments measure a force exerted on the center-strap or the singles stick by the net. In these embodiments, the measured force provides an accurate reflection of the tension of the net.

A golf club head includes a body having a recessed channel formed in an outer surface. A weight assembly that includes a weight at least partially disposed within the recessed channel, a cover extending at least partially 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 is slidably engaged with the cover and the cover is positionable in at least an unlocked configuration whereby the cover is raised at least partially out of the recessed channel and the weight is selectively slidable within the recessed channel, and a locked configuration whereby the cover is at least partially disposed within the recessed channel and the weight is secured within the recessed channel. The weight moves with the cover between the unlocked configuration and the locked configuration.

A golf club head includes a body having a recessed channel formed in the outer surface. A weight assembly that includes a weight disposed within the recessed channel and a cover extending over the recessed channel. A shelf is defined in the cover and slidably receives the weight. The weight assembly also includes 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 cover is positionable in an unlocked configuration whereby the cover is raised at least partially out of the recessed channel and the weight is slidable within the shelf and the recessed channel, and a locked configuration whereby the cover is disposed within the recessed channel and the weight is secured within the recessed channel and the shelf. The weight moves with the cover between the unlocked configuration and the locked configuration.