A trainer for improving an athletic swing includes an elastic band having an anchor end and a handle end, and configured to expand and contract. The trainer further includes a handle coupled to the handle end of the elastic band and configured to be gripped by a user. The trainer further includes a strap coupled to the anchor end of the elastic band and configured to be sandwiched between two objects to anchor the anchor end of the elastic band to at least one of the two objects.

A trainer for improving an athletic swing includes an elastic band having an anchor end and a handle end, and configured to expand and contract. The trainer further includes a handle coupled to the handle end of the elastic band and configured to be gripped by a user. The trainer further includes a strap coupled to the anchor end of the elastic band and configured to be sandwiched between two objects to anchor the anchor end of the elastic band to at least one of the two objects.

A wrist worn muscle movement monitoring device includes a wrist strap; a sensor that responds to muscle movement at a wrist wearing the wrist strap; and monitoring circuitry connected to the sensor.

An Internet of Thing (IoT) device includes a camera coupled to a processor; and a wireless transceiver coupled to the processor. Blockchain smart contracts can be used with the device to facilitate secure operation.

An Internet of Thing (IoT) device includes a camera coupled to a processor; and a wireless transceiver coupled to the processor. Blockchain smart contracts can be used with the device to facilitate secure operation.

A training, rehabilitation, and recovery system comprises an exercise apparatus including a user interface member coupled to a plurality of links and joints, brakes capable of resisting movement of at least a subset of the links or joints, and sensors capable of sensing movement at the joints or the user interface member. The system also includes a processor configured to receive from the sensors positional data of the links or joints over an initial movement of the apparatus by a user, from which positional coordinates of the user interface member are calculated and a reference trajectory is established. An end space is defined based on the reference trajectory. Over a subsequent movement of the apparatus by the user, the processor receives additional positional data and determines a completion of a repetition based on the positional coordinates of the subsequent movement and the defined end space.

A training, rehabilitation, and recovery system comprises an exercise apparatus including a user interface member coupled to a plurality of links and joints, brakes capable of resisting movement of at least a subset of the links or joints, and sensors capable of sensing movement at the joints or the user interface member. The system also includes a processor configured to receive from the sensors positional data of the links or joints over an initial movement of the apparatus by a user, from which positional coordinates of the user interface member are calculated and a reference trajectory is established. An end space is defined based on the reference trajectory. Over a subsequent movement of the apparatus by the user, the processor receives additional positional data and determines a completion of a repetition based on the positional coordinates of the subsequent movement and the defined end space.

A ball return assembly is configured to return a ball to a user. The ball return assembly has a base arranged on a ground surface with a first opening and a second opening. An elastic cord is threaded through the first opening and the second opening. A cord lock is joined to the cord first end, preventing the cord from being pulled from the base. A ball is joined to the cord. A frame is arranged proximate the base. The ball, upon contacting the frame, is pulled by the cord toward the base.

The present invention relates to a tennis wall (100), comprising a frame that can be erected on the ground (101) and a cloth (102) stretched in said frame (101), wherein the cloth (102) is stretched such that a level cloth surface (104) is formed and that a tennis ball hitting the cloth surface (104) rolls or slides up the cloth surface (104) and then rolls or slides down again, characterized in that a recess (105) is provided on the upper end (103) of the cloth (102), the recess (105) being designed and positioned such that a tennis ball, once it has rolled or slid up the cloth surface (104), then enters the recess (105), subsequently rolls or slides out of the recess (105) again and only then rolls or slides down the cloth surface (104). The invention also relates to the use of this tennis wall as an aid in tennis training.

The present invention relates to a tennis wall (100), comprising a frame that can be erected on the ground (101) and a cloth (102) stretched in said frame (101), wherein the cloth (102) is stretched such that a level cloth surface (104) is formed and that a tennis ball hitting the cloth surface (104) rolls or slides up the cloth surface (104) and then rolls or slides down again, characterized in that a recess (105) is provided on the upper end (103) of the cloth (102), the recess (105) being designed and positioned such that a tennis ball, once it has rolled or slid up the cloth surface (104), then enters the recess (105), subsequently rolls or slides out of the recess (105) again and only then rolls or slides down the cloth surface (104). The invention also relates to the use of this tennis wall as an aid in tennis training.