This invention in the field of weightlifting assists a weightlifter in training more effectively, by providing an apparatus for decreasing weight during a weightlifting movement, such that more weight is lifted initially than must be set down again afterward. The apparatus consists generally of an arm extending from a hinge anchored at a fixed height, such that the arm may be placed atop a bar or barbell to be lifted. When the bar is lifted, the arm's position relative to the hinge causes the arm to fall off of the bar and remove the weight of the arm from the weight being lifted by the weightlifter. Thus, the amount of weight the weightlifter is lowering back down again is reduced compared to the amount of weight the weightlifter initially lifted.

This invention in the field of weightlifting assists a weightlifter in training more effectively, by providing an apparatus for decreasing weight during a weightlifting movement, such that more weight is lifted initially than must be set down again afterward. The apparatus consists generally of an arm extending from a hinge anchored at a fixed height, such that the arm may be placed atop a bar or barbell to be lifted. When the bar is lifted, the arm's position relative to the hinge causes the arm to fall off of the bar and remove the weight of the arm from the weight being lifted by the weightlifter. Thus, the amount of weight the weightlifter is lowering back down again is reduced compared to the amount of weight the weightlifter initially lifted.

A weighted fitness hoop apparatus for cardiovascular and resistance exercise. The hoop comprises an elliptical tubular sheath with two end portions, the ends selectively engageable by a coupler. A hollow core extends through the length of the tubular sheath and is optionally fillable with a weight or light. The coupler is insertably engaged with the hollow core at the first and second ends of the elliptical tubular sheath, and the power source for the light is removably attached to surface of the hoop.

The invention relates to an adjustable dumbbell and its use method. The dumbbell comprises a base and a dumbbell body, the dumbbell body comprises a handle and a bell piece, the handle is a combination of a central shaft and a handle sleeve, the handle is also connected with an indexing plate, a gear piece and a bell piece box, the ends on both sides of the central shaft are provided with a snap ring groove and a gear step from the outside to the inside, and the indexing plate is provided with a lock The bell box is connected with a bell box cover, the bell box cover is connected with a locking leaf spring and a steel ball spring, the locking leaf spring is connected with a locking leaf, and the steel ball spring is connected with a steel ball.

The invention relates to an adjustable dumbbell and its use method. The dumbbell comprises a base and a dumbbell body, the dumbbell body comprises a handle and a bell piece, the handle is a combination of a central shaft and a handle sleeve, the handle is also connected with an indexing plate, a gear piece and a bell piece box, the ends on both sides of the central shaft are provided with a snap ring groove and a gear step from the outside to the inside, and the indexing plate is provided with a lock The bell box is connected with a bell box cover, the bell box cover is connected with a locking leaf spring and a steel ball spring, the locking leaf spring is connected with a locking leaf, and the steel ball spring is connected with a steel ball.

A handgrip for use with a dumbbell is provided. The dumbbell includes a handgrip top and a handgrip bottom that are connected with a handgrip hinge. A dumbbell is secured within the handgrip by placing the handle of the dumbbell into a bottom foam engagement structure in the handgrip bottom, then the handgrip top is rotated into contact with the handgrip bottom using the handgrip hinge until the handgrip reaches a closed position wherein the handgrip top is in contact with the handgrip bottom. In the closed position, a top foam engagement structure of the handgrip top is also engaging the handle of the dumbbell and opposing magnets positioned in the handgrip top and handgrip bottom magnetically engage each other to help keep the handgrip in the closed position.

Disclosed is a structurally simple, easy assembled and multifunctional kettlebell. The kettlebell comprises a kettlebell body. The kettlebell body is provided with a counterweight groove for placing at least one counterweight. The kettlebell body is provided with a positioning cover for positioning the counterweight within the kettlebell body. The positioning cover is detachably mounted in the counterweight groove. The positioning cover is capable of being raised and lowered on the kettlebell body for positioning each counterweight.

Disclosed is a structurally simple, easy assembled and multifunctional kettlebell. The kettlebell comprises a kettlebell body. The kettlebell body is provided with a counterweight groove for placing at least one counterweight. The kettlebell body is provided with a positioning cover for positioning the counterweight within the kettlebell body. The positioning cover is detachably mounted in the counterweight groove. The positioning cover is capable of being raised and lowered on the kettlebell body for positioning each counterweight.

A sensing base for an adjustable free weight may include a cradle, and a sensing assembly, which includes a plurality of sensors and mechanical components (e.g., pivoting levers), each associated with a respective plate well that accommodates a weight plate of the adjustable free weight such that each mechanical component actuates the state of a respective sensor upon placement or removal of the weight in a plate well. Sensor signals reflecting the states of the sensors are communicated, via a circuit, a processor to determine the weight selection of the adjustable free weight when removed from the base. The sensing assembly may be implemented using individual sensors of a variety of different types such as hall effect sensors, optical interrupt sensors, IR optical sensors, and the like. The base may be configured to automatically communicate the determined weight to an external computing device to facilitate activity tracking and/or fitness coaching.

A sensing base for an adjustable free weight may include a cradle, and a sensing assembly, which includes a plurality of sensors and mechanical components (e.g., pivoting levers), each associated with a respective plate well that accommodates a weight plate of the adjustable free weight such that each mechanical component actuates the state of a respective sensor upon placement or removal of the weight in a plate well. Sensor signals reflecting the states of the sensors are communicated, via a circuit, a processor to determine the weight selection of the adjustable free weight when removed from the base. The sensing assembly may be implemented using individual sensors of a variety of different types such as hall effect sensors, optical interrupt sensors, IR optical sensors, and the like. The base may be configured to automatically communicate the determined weight to an external computing device to facilitate activity tracking and/or fitness coaching.