An exercise machine is disclosed. The exercise machine comprises a pancake motor. The exercise machine comprises a torque controller coupled to the pancake motor. The exercise machine comprises a high resolution encoder coupled to the pancake motor.

A resistance force is controlled such that a user's effort against the resistance force results in a first isokinetic seed movement, wherein the user is an exercise machine user using an exercise machine. The resistance force required to effect the first isokinetic seed movement is associated with a predetermined force-velocity profile. A strength determination of the user is made based at least in part on the required resistance force and the associated predetermined force-velocity profile.

An apparatus for use in assessing strength of at least one knee flexor muscle of a subject, the apparatus including a support, two securing members, each securing member securing a respective lower leg of the subject in a position that in use is substantially fixed relative to the support and at least one sensor, which in use senses a force indicative of the strength of the at least one knee flexor muscle in at least one leg of the subject while the subject performs an eccentric contraction of the at least one knee flexor muscle.

A performance monitoring system includes a pitching mound, one or more processors, and a memory. The pitching mound includes a piezoelectric film associated with a pitching rubber, one or more rubber layers covering the piezoelectric film, a transmitter electrically coupled to the piezoelectric film, and a power source powering an amplifier associated with the piezoelectric film. The piezoelectric film generates electrical signals in response to pressure exerted on the pitching rubber. The processors are configured to receive the electrical signals generated by the piezoelectric film and transmitted by the transmitter. The processor is configured to analyze the received electrical signals based on training data using machine learning algorithms to determine at least one performance characteristic of the pitcher. The processors are configured to display on a display device the determined at least one performance characteristic in real-time.

According to an embodiment, a device for recognizing a free weight training motion comprises a depth camera obtaining image information for measuring a user's body information before exercise and obtaining image information including a unique identifier attached to a piece of exercise equipment and motion of each joint of the user and a variation in body surface due to a motion of the body of the user doing exercise using the piece of exercise equipment, a sensor unit measuring a state of the piece of exercise equipment and recognizing the user, and a controller controlling the depth camera and the sensor unit and processing various pieces of information obtained by the depth camera and the sensor unit.

An exercise machine is disclosed. The exercise machine comprises a pancake motor. The exercise machine comprises a torque controller coupled to the pancake motor. The exercise machine comprises a high resolution encoder coupled to the pancake motor.

An exercise machine is disclosed. The exercise machine comprises a pancake motor. The exercise machine comprises a torque controller coupled to the pancake motor. The exercise machine comprises a high resolution encoder coupled to the pancake motor.

An exercise machine is disclosed. The exercise machine comprises a pancake motor. The exercise machine comprises a torque controller coupled to the pancake motor. The exercise machine comprises a high resolution encoder coupled to the pancake motor.

A device including a frame, that is designed to be attached to a stationary structure element, at least one member for applying the forces produced by the patient, mounted on the frame and free to rotate about an axis of rotation that is fixed relative to the frame, a force sensor that measures, in a direction radial to the axis of rotation, the traction component of the forces applied to the member, and an angle sensor that measures the angular positioning of the member about the axis of rotation.

A resistance force is controlled such that a user's effort against the resistance force results in a first isokinetic seed movement, wherein the user is an exercise machine user using an exercise machine. The resistance force required to effect the first isokinetic seed movement is associated with a predetermined force-velocity profile. A strength determination of the user is made based at least in part on the required resistance force and the associated predetermined force-velocity profile.