A core exercise apparatus having a frame. The frame has a first wall, a second wall, a frame roof, and a frame floor. A first bumper is coupled to the frame roof. A second bumper is coupled to the frame roof. A first plate is coupled to the first frame wall. A second plate is coupled to the second frame wall. An elongated handle is coupled to the frame floor. A pendulum is coupled to the first plate and second plate such that the pendulum swings from the first bumper to the second bumper and from the second bumper to the first bumper.

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.

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.

An adjustable sledgehammer workout apparatus may include a handle, and a clamping assembly connected to the handle. The clamping assembly can include an upper portion and a lower portion, the lower portion connected to a first end of the handle, the clamping assembly operable to releasably clamp a dumbbell between the upper and lower portions of the clamping assembly. The clamping assembly can include a first clamping subassembly operable to apply a clamping force on the upper and lower portions of the clamping assembly. The clamping assembly can further include a second clamping subassembly engageable with the first clamping subassembly, the second clamping subassembly operable to increase the clamping force applied by the first clamping subassembly on the upper and lower portions of the clamping assembly.

An adjustable sledgehammer workout apparatus may include a handle, and a clamping assembly connected to the handle. The clamping assembly can include an upper portion and a lower portion, the lower portion connected to a first end of the handle, the clamping assembly operable to releasably clamp a dumbbell between the upper and lower portions of the clamping assembly. The clamping assembly can include a first clamping subassembly operable to apply a clamping force on the upper and lower portions of the clamping assembly. The clamping assembly can further include a second clamping subassembly engageable with the first clamping subassembly, the second clamping subassembly operable to increase the clamping force applied by the first clamping subassembly on the upper and lower portions of the clamping assembly.

A small golf swing training tool has the same weight balance as that of a golf club and can easily confirm the orientation of the club face during training. A golf swing training tool includes a grasping part made of a rod-shaped member, a weight part made of a plate-like (plate-shaped) member surrounding both ends of the grasping part, and an insertion hole required to allow to grasp the grasping part between the grasping part and the weight part. The grasping part is not arranged at the weight center of the weight part.

A golf swing training apparatus has a shaft, a housing with a top cap and a bottom cap, and a plurality of weighted discs receivable within the housing. A golfer may adjust the weight of the head of the club by adding or removing weighted discs in the housing. The golf swing training apparatus may comprise an accelerometer within the housing so as to measure the speed, acceleration, and swing path that the club takes for feedback and analysis to improve the golfers swing.

A golf swing training apparatus has a shaft, a housing with a top cap and a bottom cap, and a plurality of weighted discs receivable within the housing. A golfer may adjust the weight of the head of the club by adding or removing weighted discs in the housing. The golf swing training apparatus may comprise an accelerometer within the housing so as to measure the speed, acceleration, and swing path that the club takes for feedback and analysis to improve the golfers swing.

A golf practicing apparatus for providing a feedback with regard to a swing speed and form includes a hand portion, a strip portion, and a weight portion. The weight portion provides a signal when a player makes a swing with the apparatus and the signal indicates how the swing is made.

A swing motion trainer used to simulate one or more sport swing movements includes a rod portion comprising a shaft with a grip. The swing motion trainer includes a resistance portion comprising an interchangeable mechanism at a distal end of the rod portion, the resistance portion includes an interchangeable mechanism at the distal end of the rod portion, wherein the interchangeable mechanism is configured to attach a removable resistance element to the distal end of the rod portion. The removable resistance element that is attachable to the distal end of the rod portion via the interchangeable mechanism. The removable resistance element provides a resistance to a swinging motion of the swing motion trainer.