Richard A Dyer, Michael J Knauer, Berle E Rabenberg, Arthur C Bentley, Richard O Keelor: Electronically controlled exercise system. Powercise International Corporation, Pravel Gambrell Hewitt Kimball & Krieger, May 9, 1989: US04828257 (230 worldwide citation)

A system and method for providing an exercise program at a desired pace throughout each repetition and which applies resistance against a user's efforts based upon user performance history and user demographics. A central controller stores user demographics and performance information, and provides ...