A shock absorbing structure of a racket contains: a head and an absorption member matingly contacting with an internal fence of the head. The absorption member is a hollowly tubular structure and covers the internal fence totally. When the head is made of carbon-fiber composite material, the absorption member is made of any one of Thermoplastic Elastomer (TPE), Thermoplastic Rubber (TPR), rubber, Hydrogel, and Thermoplastic Polyurethane (TPU). When the head is made of metal or aluminum alloy, the absorption member is made of any one of Thermosetting Elastomers, Thermoplastic Elastomer (TPE), Thermoplastic Rubber (TPR), rubber, Hydrogel, and Thermoplastic Polyurethane (TPU). When the head and the absorption member are made of different materials, an amplitude of the head is different from an amplitude of the absorption member, and the head interferes the absorption member, thus absorbing vibration.

A shock absorbing structure of a racket contains: a head and an absorption member matingly contacting with an internal fence of the head. The absorption member is a hollowly tubular structure and covers the internal fence totally. When the head is made of carbon-fiber composite material, the absorption member is made of any one of Thermoplastic Elastomer (TPE), Thermoplastic Rubber (TPR), rubber, Hydrogel, and Thermoplastic Polyurethane (TPU). When the head is made of metal or aluminum alloy, the absorption member is made of any one of Thermosetting Elastomers, Thermoplastic Elastomer (TPE), Thermoplastic Rubber (TPR), rubber, Hydrogel, and Thermoplastic Polyurethane (TPU). When the head and the absorption member are made of different materials, an amplitude of the head is different from an amplitude of the absorption member, and the head interferes the absorption member, thus absorbing vibration.

A racquet includes a handle; and a frame connected to an end of the handle, the frame defining a rounded interior space, the frame including a negative Poisson's ratio (NPR) foam material, in which the NPR foam material, and in which the frame has a Poisson's ratio of between 0 and −1; and a network of strings stretched across the rounded interior space defined by the frame. A golf tee includes an elongated stem; and a head disposed at an end of the elongated stem and shaped to receive a golf ball; in which at least a portion of the golf tee is formed of a negative Poisson's ratio (NPR) foam material, in which the portion of the golf tee has a Poisson's ratio of between 0 and −1, and in which the NPR foam material includes an NPR metal foam, an NPR ceramic foam, or an NPR-PPR composite foam.

A racquet includes a handle; and a frame connected to an end of the handle, the frame defining a rounded interior space, the frame including a negative Poisson's ratio (NPR) foam material, in which the NPR foam material, and in which the frame has a Poisson's ratio of between 0 and −1; and a network of strings stretched across the rounded interior space defined by the frame. A golf tee includes an elongated stem; and a head disposed at an end of the elongated stem and shaped to receive a golf ball; in which at least a portion of the golf tee is formed of a negative Poisson's ratio (NPR) foam material, in which the portion of the golf tee has a Poisson's ratio of between 0 and −1, and in which the NPR foam material includes an NPR metal foam, an NPR ceramic foam, or an NPR-PPR composite foam.

Provided herein are racquets, such as sports racquets. The racquets generally comprise a head frame with a curved side portion and a straight top portion and a curved bottom portion and handle affixed to the head frame between the top portion and portion. A plurality of openings is equally spaced through the head frame and a portion of the handle and a plurality of strings comprising a net pass through the openings. The length of the top rim of the head frame is greater than the bottom rim. The handle connects to the head frame at an angle of about 140° to 150°.

Provided herein are racquets, such as sports racquets. The racquets generally comprise a head frame with a curved side portion and a straight top portion and a curved bottom portion and handle affixed to the head frame between the top portion and portion. A plurality of openings is equally spaced through the head frame and a portion of the handle and a plurality of strings comprising a net pass through the openings. The length of the top rim of the head frame is greater than the bottom rim. The handle connects to the head frame at an angle of about 140° to 150°.

A strung bat for use in playing cricket includes an elongate handle for a user to hold and a blade elongated in the direction of the handle. The blade includes a perimeter defining an internal space that is strung with an array of strings for hitting a ball. The perimeter frame has a leading edge and an opposing trailing edge, and the array of strings lies in a plane that may be substantially aligned with the leading edge of the frame or is closely adjacent to the leading edge of the frame. An apparatus for playing the game using the strung bat is also disclosed.

A racket frame includes a face portion having an annular shape in planar view, a grip portion, and a shaft portion connecting the face portion and the grip portion. At least a part of the face portion, the grip portion, and the shaft portion includes a first tubular member. The first tubular member has an inner tubular part, an outer tubular part surrounding the inner tubular part, and a release layer sandwiched between the inner tubular part and the outer tubular part.

A racket frame includes a face portion having an annular shape in planar view, a grip portion, and a shaft portion connecting the face portion and the grip portion. At least a part of the face portion, the grip portion, and the shaft portion includes a first tubular member. The first tubular member has an inner tubular part, an outer tubular part surrounding the inner tubular part, and a release layer sandwiched between the inner tubular part and the outer tubular part.

Provided herein are racquets, such as sports racquets. The racquets generally comprise a head frame with a curved side portion and a straight top portion and a curved bottom portion and handle affixed to the head frame between the top portion and portion. A plurality of openings is equally spaced through the head frame and a portion of the handle and a plurality of strings comprising a net pass through the openings. The length of the top rim of the head frame is greater than the bottom rim. The handle connects to the head frame at an angle of about 140 to 150.