A tennis practice apparatus that includes a main support member that is for mounting from an upright wall; an outer support member that is hinged with the main support member and includes a closed position wherein the outer support member is engaged against the main support member, and an open position wherein the outer support member is hinged to an open position that is substantially orthogonal to the main support member; and a pliable fabric sheet that extends between a top end of the main support member and the outer support member. The pliable fabric sheet defines a surface against which a user can hit tennis balls and retrieve tennis balls therefrom.

Systems and methods for sensing and monitoring various athletic performance metrics, e.g., during the course of a game, a practice, a training session, training drills, and the like, are described. These systems and methods can provide useful metrics for players and coaches relating to athletic performances in various sports, including various team sports.

Systems and methods for tracking a sports ball assembly in real time during a sporting event are disclosed. A structure of the sports ball assembly is also disclosed. The sports ball assembly comprises at least one electronic circuit embedded or attached to a sports ball. The sports ball assembly is in network communication with a server processor via at least two receivers within a sports arena. The sports ball assembly generates and transmits UWB data packets comprising movement-related data for the sports ball assembly in real time at a predetermined rate. The at least two receivers receive the UWB data packets and transmit to the server processor with time stamps. The server processor is operable to determine a movement of the sports ball assembly based on the UWB data packets and the time stamps received from the at least two receivers.

A throwing apparatus and method a throwing apparatus has a main body connected to a base. A cocking arm is connected with the main body at a main body axle and movably connected with a release arm. A throwing assembly is connected to a throwing assembly bracket connected to the main body at the main body axle, where the throwing assembly includes an adjustable angle assembly movably connectable with the throwing assembly, the throwing assembly configured to support a projectile, where the projectile is held at selected angles in relation to the throwing assembly by the adjustable angle assembly and where the release arm is configured to releasably connect with the throwing assembly. A power assembly is provided with a first end and a second end, where the first end is connected with the throwing assembly bracket and the second end is connected with the main body.

COVID-19 and many other infectious diseases like Flu can spread through by touch. Tennis player exchange the same balls multiple times during the practice or game. For student's safety schools and colleges currently sanitize the balls manually which is a tedious and time taking job. This invention sanitizes the bunch of tennis balls in one go with the push of a buttons and a Knob which control the speed of motor vibration.

A rope winding device includes a rope winding seat, a rope reel shaft, a ratchet and a handle. Opposite ends of the rope reel shaft pass through the rope winding seat and are rotatably connected with the rope winding seat. One end of the rope reel shaft is provided with a gear, the ratchet is rotatably mounted on the rope winding seat and meshed with the gear, and the other end of the rope reel shaft is connected with the handle. A rope tensioning device including the rope winding device is provided. A ball net frame including a net and the rope tensioning device is provided. The rope winding device, the rope tensioning device and the ball net frame are detachably assembled, which is convenient for carrying and storing and can realize rapid tensioning of the tension rope.

Systems and methods for sensing and monitoring various athletic performance metrics, e.g., during the course of a game, a practice, a training session, training drills, and the like, are described. These systems and methods can provide useful metrics for players and coaches relating to athletic performances in various sports, including various team sports.

A tennis serve toss aid comprising: 1) a ring member to be placed on a finger of the non-racket holding hand of a tennis player, 2) a bowl member that holds the tennis ball, and 3) a connector member that allows the bowl member to be attached to the ring member in a variety of orientations, The tennis serve toss training aid trains the tennis player to control the tennis ball without use of the fingers to release the ball, supinate the palm, lock the wrist and elbow, and use the tossing arm as a simple lever which moves from a down position to an up position. As the arm moves to an up position the ball is released from the bowl member due to inertia. This allows the tennis player to be able to repeatedly toss the tennis ball to substantially the same position in the air where it can be struck consistently with the tennis racket to deliver the serve.

Systems and methods for tracking a sports ball assembly in real time during a sporting event are disclosed. A structure of the sports ball assembly is also disclosed. The sports ball assembly comprises at least one electronic circuit embedded or attached to a sports ball. The sports ball assembly is in network communication with a processor via at least two receivers within a sports arena. The sports ball assembly generates and transmits UWB data packets comprising movement-related data for the sports ball assembly in real time at a predetermined rate. The at least two receivers receive the UWB data packets and transmit to the processor with time stamps. The processor is operable to determine a movement of the sports ball assembly based on the UWB data packets and the time stamps received from the at least two receivers.

Systems, methods and computer-readable media are provided for determining an effective altitude in relation to a moving sports object. In some examples, a method includes determining respective values for an air temperature, an air pressure, and a relative humidity of an environment of interest. Based on the determined respective values of the air temperature, the air pressure, and the relative humidity, an air density for the environment of interest is calculated to derive a first air density value. A second air density value is derived for a reference environment. An absolute value of a difference between the first and second air densities is compared against a preset comparison value and, based on the comparison being equal to or smaller than the preset comparison value, an output including an indicator of the effective altitude is generated.