A golf shaft assembly is a stand-alone component for subsequent use with a golf club-head. The assembly includes a shaft with an adapter that is affixed to the bottom end of the shaft for engaging with the club-head. An adapter-spline is formed near the top end of the adapter that meshes with a club-head spline on the hosel of a club-head to hold the club-head in a base position relative to the golf shaft. In this base position the club-head has a predetermined loft angle and a predetermined face angle that are presented preparatory to a golf swing by a golfer. Optionally, the assembly can include at least one annular shaped collar that can be positioned between the adapter-spline and the club-head spline for introducing loft and/or club-face adjustments to optimize the user's golf swing.

A variable stiffness striking implement, such as, for example, a ball bat typically used in baseball, softball, or rubber ball. The striking implement, preferably has a separate barrel and handle. A wedge and joint attached directly to the handle or indirectly to the handle using an interface portion engage the interior surface of the barrel. Most preferably, the wedge and joint are molded about the interface portion and a handle preform is then inserted into the intention of the interface portion and the handle is then molded. Wedge hardness is selectable and a stiffness member may also be employed. Stiffness member hardness may be selectable or may be adjustable by varied adjustment of a cap in relation to the barrel. Alternatively, the cap may not be adjustable in relation to the barrel so that a selected stiffness member hardness is fixed.

A golf club 2 includes a head 4, a shaft 6, and a grip 8. The club 2 has a forward club flex of greater than or equal to 170 mm. The forward club flex is measured for a golf club in the completed state. The weight of the head is denoted by Wh, and the weight of the club is denoted by Wc. Wh/Wc is greater than or equal to 0.72. With the golf club 2, a force acting on the player's body during a swing can be reduced. The golf club 2 can stabilize swing.

A golf club head is provided that includes a club main body that includes a front portion for striking a golf ball, a rear portion, a toe portion, a heel portion and a hosel area for receiving a shaft. The club main body further includes including a first region having a first density and a second region having a second density, wherein the club main body exhibits a single monolithic metallic material throughout.

A ball bat configured for impacting a ball. The ball bat extends along a longitudinal axis and includes a unitary bat frame and a pivot joint. The unitary bat frame includes a handle portion and a barrel portion having a distal region. The pivot joint is coupled to the distal region of the barrel portion. The pivot joint movably supports the barrel portion relative to the longitudinal axis such that the distal region of the barrel portion may pivot towards and away from the longitudinal axis about the pivot joint.

A flight stabilizer is adapted to a golf club to replace a significant section of the shaft and provides a golfer with reduced radial torque, heightened flex point, improved shaft cylindrical continuity, and increased blended swing weight, all of which create a more powerful, consistent, reliable, and better performing club. The flight stabilizer creates a smooth transition from the heavy clubhead to the light shaft tip and allows the golfer to minimize shaft rotational oscillation, improve consistency of golf ball impact on the clubface, and achieve better overall control of distance and direction of a golf shot. Additionally, the flight stabilizer enables a golfer and/or a golf professional to efficiently connect an iron-type shaft with a large diameter to a wood-type clubhead with a small diameter. Further, the flight stabilizer offers a bent section that enables the golfer to adjust the shaft to achieve desired clubhead loft.

Various embodiments include a stick handling training device for a user to hold in one hand while holding an elongate shaft of sporting equipment in another hand. The stick handling training device includes an elongate tubular body configured to cover a portion of the sporting equipment shaft. The elongate tubular body includes an outer grip surface for the user to hold in the one hand. A cylindrical passage is included through the elongate tubular body from a first aperture at a first end to a second aperture at a second end. A diameter of the cylindrical passage is larger than a widest lateral dimension of the elongate shaft such that when the elongate shaft is disposed in the cylindrical passage and the outer grip surface is held by the user, the user may freely rotate and slide the elongate tubular body relative to a longitudinal axis of the elongate shaft.

A hockey stick is provided with two blades, each of which presents a cradling profile to the puck, for both forehand and backhand shots. In one embodiment, the two blades are joined to one another with a joining member, which in some embodiments can be a concave curved structural component providing an internal curved cavity conforming to the diameter of the puck so that a player can push the puck down the ice in a shuffleboard-like manner by cradling the puck within the cavity.

Devices systems and methods are disclosed. Among other things, the devices systems and methods can facilitate ergonomic gripping of a handle; conform to the shape of a wrist; enhance golf techniques or performance; enhance racket sport technique or performance; protect a head of a user engaged in contact sports or other hazardous activities; identify concussions, in some cases in substantially real time; provide sterilization of garments; control surgical robots; allow for medical treatment of multiple subjects without disrobing; provide biometric or other data; and/or be used to train muscles or body parts for, for example, performing specified tasks using a body part.

A golf club includes a golf club head, a shaft adapter secured within a hosel of the golf club head, and a shaft secured within the shaft adapter. The golf club shaft is formed from a fiber reinforced polymer and extends along a longitudinal axis between a tip end and a grip end. The golf club shaft includes a tip end section, a grip end section, and a tapered section between the tip end section and the grip end section. The tapered section of the shaft includes a reference portion within the upper half that has a frustoconical shape with a near-constant taper rate, and a narrowed portion within the lower half. The narrowed portion is recessed relative to a reference surface extrapolated from the frustoconical shape.