Abstract: In one preferred embodiment, the present invention provides an exercise apparatus in which an impingement member is driven between a selectable start point and a selectable endpoint. When coupled with suitable instrumentation and electronic circuitry, the inventive strength training device allows the measurement, tracking, and computation of force exerted, repetitions performed, measurement and display of position, velocity, acceleration, work, impulse, etc. In addition, archived data can be used to show improvement or problem areas as well as provide an indication of the quality of each repetition and the quality of the workout in general. Such an exercise apparatus comprises: a frame including a base; a linear actuator supported from the frame; an impingement member movable relative to the frame and driven by the actuator; and a controller for controlling the actuator.

Abstract: An exerciser with force measuring devices in the form of strain gauges interposed between an impingement member on the exerciser and a strain gauge on the impingement member engaged by the user of the exerciser. The exerciser impingement member includes a handgrip for engagement by the user with strain gauges being interposed between the handgrip and impingement member for measuring forces transmitted therebetween. The impingement member is disclosed as the exercise bar in barbells and the handgrip includes a pair of handgrips spaced from each other on the bar with each handgrip including isolated sets of strain gauges for measuring radial, axial and torque forces exerted by each hand of the user.

Abstract: An impingement member is moved in a predetermined path and direction at a velocity and with a force independent of each other with the user applying a resistance force to the impingement member at any point along or throughout its range of movement. In the disclosed embodiment, a bar is coupled to a pair of mechanical drive assemblies powered by DC motor through a disengageable clutch. Omnidirectional forces transmitted are monitored through sensors associated with the bar during movement thereof along a path by the drive assemblies. A sensor monitors the position, speed at position, direction, and reference information of the drive assemblies. The force and motion data from the sensors may be utilized to evaluate muscle response and provide biofeedback from different loading patterns and to control loading programs.