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 customizable training bat comprising a handle on a proximal end, an endcap on a distal end, a plurality of body segments used for hitting balls extending between the handle and the endcap from the proximal end to the distal end over an extendable support rod, wherein said the extendable support rod is passed through each of the plurality of body segments. Body segments may have provisions for interlocking to avoid shifting in between adjacent body segments, or between handle and body segments. An optional hollow casing that encloses the body segments and connects with the handle in manner that makes it extendable, provides a hitting surface. Further, the handle has an opening for accommodating the extendable support rod and the casing. The handle also optionally has detachable knob of variable weight. The length, shape, thickness, swing weight and size of the training bat may be customized according to preferences of an athlete. The length of the training bat is varied by adding or removing the body segments. The size and shape of the bat is varied by using the desired body segments of varying dimensions. The swing weight is varied by adjusting relative placement of body segments of varying weight along the length of the training bat in between the handle and the endcap from the proximal to the distal ends.

A sports training apparatus for training athletes to deliver a ball or other object at an appropriate arc. The sports training apparatus includes an adjustable horizontal target that is positioned between the athlete and the target. It gives guidance to the athlete at the time of release. The athlete's height, game being played, desired arc, technique employed and position on the court determine the appropriate configuration, placement, and use of the sports training apparatus described herein. Athletes use the sports training apparatus repeatedly to train, learn, and be able to repeat the desired arc for a particular shot in their sport.

A portable golf swing exerciser includes: a main body of a shaft shape; a head shaft including a head, and one or more connection shafts, of which one end is detachably coupled to the head, and the other end is detachably coupled to a front end of the main body; and an antenna stick guide extended from or retracted into a rear end of the main body in a form of an antenna having multiple sections.

In general, an exercise device includes a handle having a first end and a second end. A curved member is coupled to the first end of the handle. A movable member is coupled to the curved member, with the movable member configured to travel along a length of the curved member, where the movable member has a first portion and a second portion, and the second portion is configured to move relative to the first portion. An elongate member has a first end and a second end, and the first end of the elongate member is coupled to the second portion of the movable member. A weight is coupled to the second end of the elongate member.

A length adjustable golf club includes a club head attached to a shaft at a lower end. A length adjusting kit includes a shaft insert that attaches to the shaft at an upper end. The shaft insert includes a coupling port that accepts one of an extension block or a grip adapter. To provide length adjustments of the overall club length, one or more extension blocks may attached between the shaft insert and the grip adapter. A grip assembly having a reinforcing sleeve connects to the grip adapter and extends over the shaft and any extension blocks. The grip assembly couples to the shaft through a grip adapter and grip coupling. The grip adapter and grip coupling are axially moveable prior to securement with a retaining fastener. The grip coupling may be rotationally constrained or rotationally adjustable relative to the grip adapter.

A rotational assistive device includes a first end portion configured for operable connection with a user, and a second end portion configured for operable connection with an implement utilized via a swinging motion. A main body portion extends between the first end portion and the second end portion. The main body portion includes a plurality of telescoping leg portions, such that when the implement and rotational assistive device are swung, the main body portion moves between a closed position having a closed length and an extended position having an extended length greater than the closed length.

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 base assembly for a batting tee includes a base having a base guide path formed in an upper surface of the base, and a track plate positioned such that the track plate covers at least a portion of the upper surface of the base. The track plate includes a first segment and a second segment that surrounds at least a portion of the first segment. A position of the first segment relative to a position of the second segment defines a track plate guide path that extends between the first segment and the second segment such that the track plate guide path has a same shape as the base guide path and is positioned above the base guide path. Alignment of the track plate guide path and the base guide path form a non-linear track, such that the track is configured to slidably receive a portion of a tee.

In general, an exercise device includes a handle having a first end and a second end. A curved member is coupled to the first end of the handle. A movable member is coupled to the curved member, with the movable member configured to travel along a length of the curved member, where the movable member has a first portion and a second portion, and the second portion is configured to move relative to the first portion. An elongate member has a first end and a second end, and the first end of the elongate member is coupled to the second portion of the movable member. A weight is coupled to the second end of the elongate member.