Can be used for work tests on most people, also elderly and sick people, where the load is low. The easy entrance frame and the easy adjustment of saddle and handlebar make the bike user friendly. Connection at floor level to avoid entanglement and loose hanging cables. 939E is speed independent, you can pedal with different frequency maintaining constant power output. The braking system is easy to calibrate and can be controlled at all times, which assures that the load is always correct.