An adjustable dumbbell device includes one or more weight members and one or more weight elements each having two side panels to form a chamber, and an opening formed in each of the panels, two housings detachably engaged in the weight member and the weight element, two catches slidably engaged in each of the housings and engageable with the openings of the panels for anchoring the housings to the weight member and the weight element selectively, two followers are rotatably engaged in each of the housings and each include a gear engaged with the catches for moving the catches to engage with the panels and to anchor the housings to the weight member and the weight element respectively.

Present invention discloses a golf swing practicing apparatus for practicing golf swing in a confined environment with a short-shaft golf club, practicing methods for setting up the short-shaft golf club at a proper incline angle in mid air at address position, and a mechanic model for determining the required club head weight that enables golfer to feel the same Swing Weight as he swings the short-shaft golf club or the conventional golf club.

An adjustable dumbbell system may include a handle assembly, at least one weight, at least one sensor, and a computing device. The at least one weight may be selectively fixedly connectable to the handle assembly. The least one sensor may be positioned on the handle assembly. The at least one sensor may be configured to detect a handle assembly attribute indicative of whether the at least one weight is fixedly connected to the handle assembly. The computing device may be in communication with the at least one sensor and may be configured to receive information regarding the handle assembly attribute from the at least one sensor.

A transformable balance board that may be alternately used as a balance board or wobble platform and a wheeled board or roller platform. The balance board includes a rigid platform preferably covered with a closed-cell yielding foam pad layer on top on which a user can support his or her weight. When used as a wobble platform, a relatively large central fulcrum member extends down from the rigid platform so that the board wobbles with no stable horizontal position. In a second usage configuration as a wheeled board or roller platform a plurality of sturdy wheels or rollers retracted into the underside of the rigid platform are extended vertically downward from their retracted positions. Because the vertical height of the wheels is greater than the vertical height of the fulcrum member below the rigid platform, the wheels make contact with the ground and the fulcrum is lifted up and out of contact with the floor below.

A swivel handle capable of rotating or swiveling is disclosed. The swivel handle comprises a handle that is capable of rotating relative to a base plate or an enclosure or other object to be pulled. The swivel handle may further comprise a rotatable plate wherein the handle is connected to the rotatable plate, a rotational locking assembly, and/or a braking assembly.

An adjustable barbell or dumbbell or exercise device includes a handle device having a handle bar engageable into grooves of a number of weight members, a number of plates disposed on the handle bar and engageable between the weight members, and the plates each include an engaging element for engaging with the weight members and for anchoring a selected number of weight members to the handle bar, and a detecting device is attached to the handle device and includes a weight detector connected to a processing unit for sending weighing signals to the processing unit, and a displayer for displaying a total weight of the handle device and the weight members.

A free weight organization system is described that prevents misplacement of the free weight plates on the weight rack. The system includes weight plates with recesses and keyed weight rack posts with corresponding projections. The placement of the recesses varies from one size of weight plate to another, preventing a weight plate of the wrong sized being placed on a rack post of the weight rack. The weight plates may also include a loading rest recess, with the keyed rack posts having a loading rest rod to assist in the correct placement of the plates on the rack.

A low friction rehabilitation board having an integral band retaining feature is described. The rehabilitation board may have a coefficient of static friction of no more than about 0.5 and in some embodiments no more than about 0.06. A non-slip material may be attached to the bottom surface of the rehabilitation board. A band retaining feature is described as being integral to the rehabilitation board such that it is attached to the board, or may be fastened to the board. Additionally, in some embodiments, the board comprises range markings for the determination of the degree or amount of exertion or extension. Furthermore, the range markings may be calibrated to specific resistance band types. In other embodiments, the rehabilitation board may be configured with interlocking features to provide a modular option for combining boards when more extension is required.

A weight rack having an elongated base is provided. The base may include a front side and a rear side. The base may include a height that is substantially greater than a width. Protruding from the front side of the base includes a plurality of U-shaped cradles. The U-shaped cradles may be oriented along the height of the elongated base. Each of the U-shaped cradles may be formed to receive and secure a dumbbell.

A portable, foldable barre exercise device providing balance support for a user during exercise may include a pair of legs and a pair of support arms. Each support arm may be pivotally attached to a corresponding leg and may be adapted to be extended upward with the device in an open state. A horizontal exercise bar may be arranged between upper ends of the support arms. The device may further include a pair of weight stacks of removable dumbbells, each attached to a corresponding support arm, and one or more quick release straps for facilitating folding of the device into a closed state for stowage and for strapping the support arms and legs together. The device is lightweight yet structurally configured so as to support a user's entire weight thereon.