A gravity training ball includes a ball core unit having a predetermined weight specification, a buffer unit covering the ball core unit and made of a material having a shock absorbing effect, and an outer cover unit covering the buffer unit. The ball core unit includes an inner bladder defining a receiving space, and a filler received in the receiving space. The inner bladder has an inflation valve for inflation of air into the receiving space. The buffer unit has a thickness ranging from 2 mm to 30 mm. The ball core unit further includes an inner wrapped yarn layer disposed between the inner bladder and the buffer unit. The outer cover unit includes an outer cover layer covering the buffer unit.

Disclosed is a kettlebell type apparatus for gymnastics including: a substantially spherical shaped body formed by a single flexible layer made of polymer material which defines an inner cavity: and a rigid handle fixed to the upper part of the body. The cavity is filled with a filling material that includes at least one liquid, where the filling material occupies from 10% to 80% of the volume of the cavity, and in which the body includes at least one sealable mouth for introducing the filling material into the cavity.

A pipe exercise device designed to allow a user to transport a weight variable exercise device. The pipe exercise device includes an elongated member with an outer shell having a hollow interior designed to receive items therein. The elongated member has an open end disposed opposite a sealed end, wherein the open end is in communication with the hollow interior, such that a weight can be received therethrough to sit within the hollow interior. An end cap is designed to seal the open end, such that the weights therein are removably secured. At least one handle is disposed on the outer shell, such that the user can grasp the pipe exercise device. In this way, a user is able to transport a weight training device that can quickly and simply change the amount of weight used.

In one aspect, the invention features a barbell including a first end portion, a second end portion, and a middle portion, where the middle portion is couplable to the first end portion and the second end portion. The middle portion includes a male coupling extending from a first end of the middle portion, the male coupling providing a first coupling mechanism that engages with a corresponding female coupling of the first end portion, and a female coupling providing a second coupling mechanism that engages with a corresponding male coupling of the second end portion.

A football training device including a vest having a breast plate. A deformable corrective member having an elongate tubular-shaped shape, a proximal end and a distal end, is attached to breast plate and extends outwardly substantially perpendicular to the breast plate of the vest. The tubular-shaped member is positioned on the breast plate on a side of the breast plate that relates to the throwing hand of a user and is positioned at a height on the breast plate that alerts a user of a low football takeaway from a neutral position to a loaded football ball position. A restraining device is removably attached to the vest. The restraining device is positioned on a side of the vest that relates to the non-throwing hand of the user to urge the non-throwing hand of the user to remain close to the breast plate during a throwing motion of the throwing hand.

An exercise apparatus includes at least one resilient member; a first weight connected to a first end portion of the at least one resilient member; a second weight connected to a second end portion of the at least one resilient member, and a holding member connected to a center portion of the at least one resilient member, the center portion being between the first and second end portions. Another exercise apparatus includes a holding member; a first resilient member having first and second end portions, the first end portion being connected to the holding member; a first weight connected to the first resilient member; a second resilient member having first and second end portions, the first end portion being connected to the holding member opposite the first end portion of the first resilient member; a second weight connected to the second resilient member.

A system for use in personal fitness can include an article of clothing configured to be worn by a user during a personal fitness session. The article of clothing can have a designated portion that includes a coupling mechanism. The article of clothing can also have a weighted unit having a coupling mechanism configured to interact with the coupling mechanism of the portion of the article of clothing to cause the weighted unit to remain substantially in place at the portion of the article of clothing during the personal fitness session.

A running device and method of using the device are disclosed. The device may include a moveable material within an inner chamber of the running device's housing. In operation, a running device may be held in each hand and the runner may thrust both hands downward prior to landing and quickly bring the devices to a vertical stop after landing. Bringing the devices to a vertical stop may cause the moveable material to collide with the housing and increase the force exerted by the runner on the ground. A delay component may delay the peak force exerted by the material against the housing so that the translation of that force to the ground coincides with the peak force that the runner would have exerted against the ground in the absence of the devices.

A weight collar for retaining a weight on a bar, comprising a bar engaging section having an opening for receiving the bar therethrough and a weight engaging section having proximal and distal ends, the weight engaging section extending from the bar engaging section so as to extend at least partially toward the weight when the bar engaging section receives the bar through the opening, the bar engaging section being configured to engage the bar with a gripping force as the weight exerts a rotational force on the distal end of the weight engaging section so as to prevent the weight from sliding off the bar, the distal end of the weight engaging section being orthogonally spaced at least 1 inch from a central axis of the opening, a center of gravity of the collar being orthogonally spaced at least 0.1 inches from the central axis toward the distal end.

A golf training aid may appear to take the form of a golf club, sometimes without a club head. At a proximal end, or end near the golfer, the training aid may comprise a standard golf grip attached to a carbon fiber cylinder portion, the cylinder portion containing a magnet, with a rubber seat disposed upon the magnet. A metallic ball bearing may be in magnetic attachment the magnet. A plurality of additional ball bearings, smaller than the metallic ball bearing, may be magnetically retained and distal to metallic ball bearing. The ball bearings may be disposed within a laminated polycarbonate tube. A far end or distal end of the training aid may comprise a rubber plug to contain ball bearings that have traveled down the tube, optional weights and a magnetic end cap.