Training equipment includes a hollow shaft having a sidewall defining an internal cavity and at least one polymer material filling at least a portion of the internal cavity. The polymer material may fill the entire internal cavity of the hollow shaft. The polymer material may be a visco-elastic polymer material or polyurethane. A spacer or a filler may fill at least a portion of the internal cavity. A method of making weighted training equipment with a hollow shaft having a sidewall defining an internal cavity may include injecting a curable composition into at least a portion of the internal cavity. The method may further include curing the curable composition into a polymer material.

A wrist strengthening device includes a first handle, a second handle, and a tightening component in the form of a clamp configured to tighten around at least a portion of the first handle and at least a portion of the second handle. A sleeve is positioned radially between 1) the tightening component and 2) the at least a portion of the first handle and the at least a portion of the second handle. An interior member in the form of a rod extends from at or near an axial end of the first handle to at or near an axial end of the second handle. The device further includes a first end cap at the axial end of the first handle and a second cap at the axial end of the second handle. The wrist strengthening device is devoid of any spring component.

Disclosed herein is a grip comprising an internal bore with an opening having an internal tapered edge. The grip can engage with a tool or a piece of sports equipment. Further disclosed herein is a method of installing a grip onto a tool or piece of sports equipment, including providing a grip having a tubular body; grinding an open first end of the body, wherein the open first end comprises a greatest diameter closest to the exterior of the bore and tapers internally at an angle towards the interior of the bore; providing a shaft or handle; applying an adhesive to a top portion of the handle; sliding the handle into the grip bore until the shaft contacts the a capped second end of the grip; and coupling a surface of the bore to the handle by allowing the adhesive to dry.

A goal that is configured to connect to a frame of a trampoline. The goal includes tube clamps, support tubes, pivoting brackets, and multiple bars that support a netting. The tube clamps are rotatable around the poles to which they are attached, and the pivoting brackets can pivot around the connection point with the support tubes.

A sensor system includes an airbag engaged with the sole structure of an article of footwear, the airbag configured to compress and expand during use of the article of footwear, a force sensor engaged with the airbag and configured to detect force on the airbag based on changes in capacitance as the airbag compresses and expands, a port connected to the article of footwear and configured for communication with an electronic module, and one or more conductive leads extending from the force sensor to the port to place the force sensor in communication with the port. The system may be used with an article of footwear including an upper member at least partially defining a foot-receiving chamber and a sole structure engaged with the upper member.