The original ergometer is the cycle. The frame of the motion cycle 500 med has been designed to match ergonomic requirements and for an optimal seat positioning and a low step through. The brake system is independend from an external power supply, powerful and can be calibrated. Especially the cycle is of major interest in medical applications, because it can be integrated into several other medical systems. The optional length adjustable crank arm is important for the use in orthopedic institutes.