A razor accessory that receives a handle of a razor includes a body with a rounded exterior surface and a rectangular channel interior with flat walls to define a rectangular channel from a first end of the body and terminating at a second end of the body and a slit through the body in an axial direction relative to a central axis of the body from the first end of the body toward the second end of the body. The handle of the razor is received by the body with a sliding motion of an end of the handle into the rectangular opening at the first end of the body.

A training racket with a user end on one side and a hitting end on an opposite side. The user end further comprises a first grip, a second grip, and a generally u-shaped segment interconnecting the first grip and the second grip. The generally u-shaped segment extends away from an axis extending through the first grip, the second grip and the hitting end, whereby the player positions a portion of the racket behind their back with a first grip on one side of their body and the second grip on the opposite side of their body to practice their hitting and swinging techniques.

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.

Golf clubs according to at least some example aspects of this disclosure may include a golf club head and a shaft configured to engage with the golf club head which includes a grip engaged with the shaft. Further, the golf club may include a monitoring device, which includes a sensor and a transmitter. Additionally, the monitoring device may be configured to determine data related to the characteristics of a golf swing. Further, the monitoring device may be configured to transmit the data related to the characteristics of a golf swing to a remote computer.

A tennis racket with a removable weight is provided. The tennis racket includes: (i) an upper portion, (ii) a handle, and (iii) a butt. The upper portion includes a mesh of wires. The handle secures the removable weight in a hollow space. The butt couples to the handle at bottom portion of the handle using threads.

A tennis racket with a removable weight is provided. The tennis racket includes: (i) an upper portion, (ii) a handle, and (iii) a butt. The upper portion includes a mesh of wires. The handle secures the removable weight in a hollow space. The butt couples to the handle at bottom portion of the handle using threads.

A tennis racket with a more-responsive string configuration is an apparatus that allows a user to hit a tennis ball with spin and power in a controlled manner. The apparatus includes a closed-shape beam, a throat, an elongated handle, and a plurality of lines. The elongated handle allows the user to firmly grasp the apparatus, and the throat connects the elongated handle to the closed-shape beam. The plurality of lines is tensionably mounted within the closed-shape beam in order to provide the present invention with an elastic contact area for the tennis ball. Each of the plurality of lines includes a first string and a second string, which are positioned along each other for each of the plurality of lines. In addition, a lateral surface of the first string is positioned tangent to a lateral surface of the second string.

A tennis racket with a more-responsive string configuration is an apparatus that allows a user to hit a tennis ball with spin and power in a controlled manner. The apparatus includes a closed-shape beam, a throat, an elongated handle, and a plurality of lines. The elongated handle allows the user to firmly grasp the apparatus, and the throat connects the elongated handle to the closed-shape beam. The plurality of lines is tensionably mounted within the closed-shape beam in order to provide the present invention with an elastic contact area for the tennis ball. Each of the plurality of lines includes a first string and a second string, which are positioned along each other for each of the plurality of lines. In addition, a lateral surface of the first string is positioned tangent to a lateral surface of the second string.

One embodiment of an extendable and retractable tennis racquet contains a stringed area 01, throat 02, and shank 03 as one integral member. The handle is comprised of a shank inside of a hollow handle 05. A spring or flexible means 07 connects the shank to the hollow handle. When the racquet is swung, the centrifugal force generated pulls on the head assembly. The shank slides outward telescopically, thereby increasing the length of the racquet. At the end of the racquet swing, the restoring force of the spring overcomes the diminishing centrifugal force, which pulls the shank back to its retracted position. Other embodiments are described and shown.

Golf clubs according to at least some example aspects of this disclosure may include a golf club head and a shaft configured to engage with the golf club head which includes a grip engaged with the shaft. Further, the golf club may include a monitoring device, which includes a sensor and a transmitter. Additionally, the monitoring device may be configured to determine data related to the characteristics of a golf swing. Further, the monitoring device may be configured to transmit the data related to the characteristics of a golf swing to a remote computer.