Abstract: An apparatus for providing feedback to a user of a weight stack machine having weights for lifting has an enclosure adapted for attachment to the weight stack machine. A weight sensor weight for determining the number of weights lifted is provided as well as an means for detecting the motion of the weights during a lift. An electronic detector is operatively coupled to the weight sensor and the encoder for computing data describing the number of weights lifted. An interface for transmitting the computed data from the electronic detector to a central storage and the display is provided. The interface also receives information from the central storage and displays it on the display.

Abstract: An apparatus for providing feedback to a user of a weight stack machine having weights for lifting has an enclosure adapted for attachment to the weight stack machine. Means for sensing weight for determining the number of weights lifted is provided as well as encoder means for detecting the motion of the weights during a lift. Electronic detection means are operatively coupled to the weight sensors means and the encoder means for computing data describing the number of weights lifted. Interface means for transmitting the computed data from the electronic detection means to a central storage means and the display is provided. The interface means also receives information from the central storage means and displays it on the display.