An artificial shuttlecock feather for implanting in a circular ring shape into a base of a shuttlecock, the artificial feather includes: a vane section; and a rachis section supporting the vane section, the rachis section being formed from a material having a Charpy impact strength of 30 kJ/m.sup.2 or greater and a flexural modulus of 4 GPa or greater, and preferably having a Charpy impact strength of 36 kJ/m.sup.2 or greater and a flexural modulus of 4.7 GPa or greater.

A tactile reference attachment for providing a user with tactile biofeedback. The attachment includes a tactile reference feature that extends longitudinally along an exterior body surface and is formed with dimensions specifically tailored to harness the user's natural attributes of sensibility, proprioception, and neuromuscular memory to improve a user's performance.

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 plurality of nested shuttlecocks are stored inside a storage tube that has removable (e.g., screwable) caps covering both ends of the tube. There are two removable caps, one at each end of the tube. One cap is long enough to hold a perforated container (i.e., puck) that contains a humidifying material (e.g., water-containing Propylene glycol, or water-containing Polymer); while the other (opposing) cap is long-enough to contain a battery-powered, electronic hygrometer

The present invention relates to an apparatus, method and computer program for collecting and processing digital information by computer vision and/or tracking as well as observing specific events during sports, in particular during the practice of racket sports, comprising: at least one camera pair for obtaining real image-related information in sports-related stereo, processor for processing the actual image-related information from the at least one camera, memory space containing stored comparison data for typical actions of a fictitious athlete and for typical movements and positions of a fictitious ball, the camera, processor and memory space all to each other for both storage and retrieval of digital information, the processor comparing the actual image-related information from the at least one camera with the corresponding stored comparison data from the memory space and categorizing the work image-related information.

A ball pick-up scoop can be attached to, or molded on, the head end of a tennis racquet. When mounted, formed, or attached the scoop protrudes roughly 80?-90? away from the face side of the racquet. While standing up straight and holding the handle of the racquet, the user slides/pivots the scoop under a ball (tennis, rubber, synthetic, etc.), which cradles the ball between the scoop's ball guides and the racquet's face to facilitate picking up the ball without ever bending over. Once the ball is cradled the user can pivot the racquet up to their opposite hand and grab the ball, or flip the ball up and hit the ball, or let it bounce and then hit the ball.

An artificial shuttlecock feather that is to be implanted in a circular ring shape into a base of a shuttlecock, the artificial shuttlecock feather includes: a vane section; and a rachis section having one end in an axial direction of the rachis section fixed to the base and supporting the vane section provided to another end side of the rachis section, a hole being formed in the vane section so as to penetrate the vane section, and a porosity of a first region of the vane section being lower than a porosity of a second region of the vane section, the first region spanning from an edge on the one end side in the axial direction to a predetermined position further toward the one end side than a center of vane section in the axial direction, the second region spanning from the predetermined position to an edge on the other end side in the axial direction.

A display method includes acquiring first attitude information of the hands of a subject holding an exercise equipment during standing still on the basis of an output from an inertial sensor (sensor unit) which measures a swing action of the subject (user) performing a swing with the exercise equipment (golf club) and is attached to at least one of the exercise equipment and the subject, acquiring second attitude information of the hands of the subject holding the exercise equipment at impact on the basis of an output from the inertial sensor, and displaying at least one of the first attitude information and the second attitude information.

A racket includes: a grip; an annular frame; and a shaft coupling the grip and the frame together; wherein a projection is provided to an outer peripheral face on a leading end half of the frame in a predetermined range including a location of maximum curvature in a peripheral direction.

A string set is a string set strung on a racket as a main string and a cross string, and is configured to include a first string strung as any one of the main string and the cross string and has a small friction force and a small diameter and a second string strung as another one of the main string and the cross string and has a larger friction force and a larger diameter than the diameter and the surface friction force of the first string. This distributes functions to the first string and the second string to obtain both the hairpin performance, which is improved by the large surface friction force and outer diameter of the string, and the cut smash performance, which is improved by the small surface friction force and outer diameter of the string, at the same time.