A vertical jump system is described herein. The system includes a first member and a second member each having a member base that sits under a flooring, a flexible cord that extends between the first member and the second member at a desired height, fixtures coupled to the flexible cord along the first member and the second member. The flexible cord remains at the desired height when contacted. The fixtures are slidable along the first member and the second member and adjust the height of the flexible cord. This configuration allows a user to easily adjust the height of the vertical jump for training, athletics, and competition, without the cord or system components dislodging and causing injury to the user.

A vertical jump system is described herein. The system includes a first member and a second member each having a member base that sits under a flooring, a flexible cord that extends between the first member and the second member at a desired height, fixtures coupled to the flexible cord along the first member and the second member. The flexible cord remains at the desired height when contacted. The fixtures are slidable along the first member and the second member and adjust the height of the flexible cord. This configuration allows a user to easily adjust the height of the vertical jump for training, athletics, and competition, without the cord or system components dislodging and causing injury to the user.

A flexible and self retracting crossbar, which is formed of multiple different separated pieces with an elastic device in between, and has a self retracting pulley device.

A vertical jump system is described herein. The system includes a first member and a second member each having a member base that sits under a flooring, a flexible cord that extends between the first member and the second member at a desired height, fixtures coupled to the flexible cord along the first member and the second member. The flexible cord remains at the desired height when contacted. The fixtures are slidable along the first member and the second member and adjust the height of the flexible cord. This configuration allows a user to easily adjust the height of the vertical jump for training, athletics, and competition, without the cord or system components dislodging and causing injury to the user.

A vertical jump system is described herein. The system includes a first member and a second member each having a member base that sits under a flooring, a flexible cord that extends between the first member and the second member at a desired height, fixtures coupled to the flexible cord along the first member and the second member. The flexible cord remains at the desired height when contacted. The fixtures are slidable along the first member and the second member and adjust the height of the flexible cord. This configuration allows a user to easily adjust the height of the vertical jump for training, athletics, and competition, without the cord or system components dislodging and causing injury to the user.

The disclosure relates to a ski boot shell having a notch in the rear upper portion thereof, a rear bearing element movably connected relative to the shell, the rear bearing element has a first position in which it abuts against at least one surface of the shell to at least partially close the notch when skiing, and a second position withdrawn backward to allow the leg of a skier to be straightened when walking.

A golf club head including a club face defined by a toe end, a heel end, a top rail and a sole. The golf club head including a plurality of grooves disposed on the club face between the top rail and the sole. Each groove extends between the toe end and the heel end. Depths of the grooves vary in a direction extending between the top rail and the sole and in a direction extending between the heel end and the toe end. Widths of each of the plurality of grooves vary in a direction extending between the heel end and the toe end.

A golf club head has a stranded structure such as a cantilevered strand or a beam strand. The stranded structure causes changes in acoustic properties from that of a standard golf club. A gap or through-hole around the stranded structure may be filled with a vibration dampening material, such as flexible polymer, to further adjust the acoustic properties of the golf club. Vibration frequency regions in a golf club may be modified by incorporating stranded structures in the vibration frequency regions.

The exercise system of the disclosure comprises one or more flexible, elongate exercise components, such as a resistance band, that is releasably connected to a handle via connector portion. In accordance with the disclosure, the connector portion generally comprises a base having a sliding lock thereon that slides in a direction normal to the exercise component to securely and releasably clamp a portion thereof between the sliding lock and the base portion.

The exercise system of the disclosure comprises one or more flexible, elongate exercise components, such as a resistance band, that is releasably connected to a handle via connector portion. In accordance with the disclosure, the connector portion generally comprises a base having a sliding lock thereon that slides in a direction normal to the exercise component to securely and releasably clamp a portion thereof between the sliding lock and the base portion.