A configurable golfing apparatus including a rectangular handle portion. The rectangular handle portion includes a golf club shaft that is securely mounted within the configurable golf club handle. The rectangular shape provides new and additional hand placement and new and additional configuration capabilities for both right handed and left handed golfers. The configurable golfing apparatus allows different golf club heads (e.g., drivers, irons, putters, etc.) to be inserted and removed from the configurable golfing apparatus. The golf club shaft inside the rectangular handle portions complies with straightness, bending and flexibility, and twisting and torque, properties and attachment to a golf club head requirements for a golf club shaft required by the United States Golf Association (USGA) and Royal and Ancient (R&A) Golf Club of St Andrews rules and functions in a manner similar to a golf club shaft not enclosed in a rectangular handle portion.

A configurable golfing apparatus including a rectangular handle portion. The rectangular handle portion includes a golf club shaft that is securely mounted within the configurable golf club handle. The rectangular shape provides new and additional hand placement and new and additional configuration capabilities for both right handed and left handed golfers. The configurable golfing apparatus allows different golf club heads (e.g., drivers, irons, putters, etc.) to be inserted and removed from the configurable golfing apparatus. The golf club shaft inside the rectangular handle portions complies with straightness, bending and flexibility, and twisting and torque, properties and attachment to a golf club head requirements for a golf club shaft required by the United States Golf Association (USGA) and Royal and Ancient (R&A) Golf Club of St Andrews rules and functions in a manner similar to a golf club shaft not enclosed in a rectangular handle portion.

An underwater training apparatus is disclosed. The underwater training apparatus may include a barrel. The barrel may contain a plurality of holes disposed across the barrel. Each of the holes of the barrel may pass through a wall of the barrel. The underwater training apparatus may also include a base funnel. The base funnel may contain a plurality of holes disposed across the base funnel. Each of the holes of the base funnel may pass through a wall of the base funnel. The underwater training apparatus may also include a handle. The handle may mechanically couple the barrel and the base funnel.

An adjustable laser-sensor paired system for creating or replicating a desired swing form includes a laser device and a sensor device. The laser device has a laser which emits a laser beam and a mounting device which attaches the laser device to an object. The orientation of the laser is adjustable. The sensor device has an optical linear position sensor for detecting the laser beam of the laser device and a display with LEDs for providing feedback and user interface. With the system and method, one or more checkpoints for the form of a desired swing can be created at a selected point in the swing path, which may then be used as practice reference guides to check whether the user is correctly replicating the desired swing.

The present invention provides an anti-rotational element, in the form of an adapter, a member integrated into the shaft or integrated into the head that increasing the front-to-back dimension of the stick compared to the side-to-side width dimension of the stick. The increased front-to-back dimension increases the anti-rotational torque that a lacrosse player, particularly a goalie, can generate. As a result, the goalie can prevent the stick from rotating in their hands when shots are off center relative to the longitudinal axis of the shaft thereby allowing the goalie to make saves that would otherwise result in a goal. The invention also aids in instructing goalies to avoid too tightly gripping the stick, which slows a goalies reaction time for a save.

Representative embodiments of the present technology include a bat having a barrel shell and a frame structure. The barrel shell may include a barrel region of the bat and part of a tapered region of the bat. The frame structure may include a first portion positioned outside the barrel shell and a second portion positioned inside the barrel shell. In some embodiments, a distal end of the frame structure is in the barrel region but is longitudinally spaced from a distal end of the barrel shell. In some embodiments, the distal end of the frame structure is longitudinally spaced from an end cap of the bat. The barrel shell may flex or pivot relative to the second portion of the frame structure. In some embodiments, the only connection between the frame structure and the barrel shell within the barrel shell may be within the tapered region.

Representative embodiments of the present technology include a bat having a barrel shell and a frame structure. The barrel shell may include a barrel region of the bat and part of a tapered region of the bat. The frame structure may include a first portion positioned outside the barrel shell and a second portion positioned inside the barrel shell. In some embodiments, a distal end of the frame structure is in the barrel region but is longitudinally spaced from a distal end of the barrel shell. In some embodiments, the distal end of the frame structure is longitudinally spaced from an end cap of the bat. The barrel shell may flex or pivot relative to the second portion of the frame structure. In some embodiments, the only connection between the frame structure and the barrel shell within the barrel shell may be within the tapered region.

A golf tip plug housing includes an exterior surface configured to be securably affixed to a butt end of a golf club shaft and an interior surface configured to securably receive a golf tip plug having an outer diameter of either: (a) 7.0 mm-7.6 mm or (b) 4.0 mm-4.6 mm. In one aspect, a golf club includes a head and a shaft having a tip end attached to the head and a butt end opposite the tip end. A tip plug includes a stem and a head. The tip plug stem has an outer diameter sized to be insertable in the tip end. A tip plug housing has an outer diameter sized to be insertable in the butt end and an inner diameter sized to receive the tip plug. The tip plug is positioned in the tip plug housing and the tip plug housing is positioned in the butt end.

A golf club has a first shaft coupled to a club head, a second shaft configured to slidably engage a portion of the first shaft, a grip coupled to the second shaft, and an adjustable length shaft assembly received by the second shaft and configured to allow a portion of the first shaft to slide in relation to the second shaft in a first configuration, and to restrict a portion of the first shaft from sliding in relation to the second shaft in a second configuration. The grip is restricted from rotation about the first shaft or the second shaft as the first shaft slides in relation to the second shaft.

A golf club comprises a tubular shaft and a weight member. The shaft has a first end having a first inner diameter and a second end on the opposite side thereof. The weight member is attached to the first end, and comprises an insertion portion disposed in the hollow of the shaft, an engaging portion engaged with the first end on the outside of the shaft, protrusions protruding radially from the insertion portion. Each protrusion has a tapered portion in which the radially outwardly protruding height from the insertion portion is decreased toward the second end. The length of each tapered portion is more than 50% of the maximum length of the protrusion, both measured in the shaft axial direction.