Patent ID: 7815549

Claim:
An exercise device having a pair of treadles capable of upward and downward motion, comprising: a treadle control unit for controlling a resistance to the upward and downward motion of the treadles, each treadle including a frame, a front roller and a rear roller rotatably supported by the frame, and an endless belt disposed about the front and rear rollers and movable relative to the frame, each treadle pivoting at a rear of the frame; a treadle position sensor for detecting the upward and downward motion of the treadles and providing a signal representative of positions of the treadles; a tread speed sensor configured to measure a speed of at least one of the endless belts; and a central processing unit receiving the signal and providing a treadle control signal to the treadle control unit to adjust the resistance of the treadles based at least in part on the received signal and the measured speed of the at least one of the endless belts, wherein the resistance to downward motion of the treadles is increased when the measured speed of the at least one of the endless belts decreases and the resistance to downward motion of the treadles is decreased when the measured speed of the at least one of the endless belts increases.