A system and method for improving a golf swing. The system includes a club lie angle calculator, a golf club grabber, and a propeller channel for creating and supporting a swing plane for a user equal to the lie angle of a given golf club.

A weight training apparatus having at least one main chain having a series of interconnected segments, at least one connection marker at specified segments on the at least one main chain, at least one tangent chain, at least one tangent chain connector to connect the at least one tangent chain to the at least one main chain, at least one data hub, at least one data processor, and at least one data communicator.

The spherical dynamic resistance device enables simultaneous strength, core and cardiovascular training. A cavity exists whereby resistance bands are stored. By removing a band and connecting it to the exterior of the device at an attachment point and thereafter attaching the other end of the resistance band to a fixed point a user can engaged device to conduct a full body workout. The cavity can also retain a mass element adding weight thereby customizing the weight of the spherical dynamic resistance device. A serpentine channel associated with the outer portion of the device enables a user to grip the device while engaging hand, arm and core muscles. By gripping the device and through various motions that pull opposite of the resistance band while supporting the spherical dynamic resistance device of various weights, a user is able to attain a full body workout.

A handgrip for skipping ropes having a hollow handle, for gripping the handgrip and configured for housing at least one internal ballast; and a connection element for connecting the handle to a rope; an external ballast able to be fixed to the handle, surrounding and configured for gripping the handgrip.

A handgrip for skipping ropes having a hollow handle, for gripping the handgrip and configured for housing at least one internal ballast; and a connection element for connecting the handle to a rope; an external ballast able to be fixed to the handle, surrounding and configured for gripping the handgrip.

A fitness training bag is provided and includes a body having a first interior volume therein that houses a bladder disposed within the first interior volume. The bladder defines a second interior volume therein that houses a fluid disposed within the second interior volume. A handle is coupled to the body and is configured to facilitate manipulation of the body to perform an exercise. An outer bag for a fitness bag and a fitness training bag system are also provided.

Embodiments of a golf club head comprising a weight system are described herein. In some embodiments, the golf club head comprises a head body with a multi-density weight in combination with a removable weight. The multi-density weight and the removable weight act in tandem for preferred swingweighting. Other examples and related methods are also described herein.

An exercise apparatus including a base, a support extending from the base, a lever, at least one seat arm and a seat is disclosed. The lever, which is pivotally connected to the support about a first horizontal pivot axis, has first and second portions extending on, respectively, first and second sides of the first horizontal pivot axis. The at least one seat arm upper portion and lower portions connected to, respectively, the first portion and the seat. The seat is pivotally connected to the first portion about a second horizontal pivot axis, which is parallel to the first horizontal pivot axis, via the at least one seat arm. The lever selectively pivots about the first horizontal pivot axis between first and second positions, the seat being higher in the first position than in the second position, and the lever being biased toward the first position.

A soft, silent barbell or dumbbell plate designed for low cost fabrication, shipping and sales. It incorporates a leak proof seal to ensure the sand, steel shot or other filler will not come out of the plate during use. It is adjustable in weight and with its durable outer shell, will not mark or chip floors. Since the plate's outer surface is flexible and the general geometric circular plate configuration may deform slightly, the plate is substantially silent in use and when contacting similar plates and the floor.

A soft, silent barbell or dumbbell plate designed for low cost fabrication, shipping and sales. It incorporates a leak proof seal to ensure the sand, steel shot or other filler will not come out of the plate during use. It is adjustable in weight and with its durable outer shell, will not mark or chip floors. Since the plate's outer surface is flexible and the general geometric circular plate configuration may deform slightly, the plate is substantially silent in use and when contacting similar plates and the floor.