throw directly relate to the extent to which a knee or hip can be flexed or extended determining these values serves as the starting point and subsequent adjustment points for the physical rehabilitation in addition to the height adjustment the seat 12 may also slide forwards and backwards along adjustable rails 27 the seat 12 should have proper padding 31 and conform to the user in some instances the seat 12 may be detachable either by removing the seat 12 along with the telescoping support 23 or by simply removing the seat 12 in order to adjust the seat 12 the microprocessor display unit 20 follows the protocol in fig7 based on the user 39 s height and current range of motion of a particular joint or appendage an initial seat height can be selected 200 for a new user this means that someone will either manually input a value for leg length or move the seat up down until the position is correct the initial process provides for the manual adjustment of the seat height 205 in order to begin at the proper height the legs of the user should usually be fully extended if possible at the bottom of the pedal circumference 210 for first time users it is preferable to have the physical therapist rehabilitation technician pt aid in helping to set the seat height 215 from there calculations in leg length can be made and stored in the user 39 s data profile 220 once the manual adjustment is disabled 225 the user is free to begin exercising and letting the microprocessor display unit 20 make the necessary adjustments for the user fig8 is a perspective view of.