Abstract: Objective To explore the factors associated with the rehabilitation outcome of lower limbs training with MOTOmed, such as the height and distance of seats, the crank length and the speed, as well as the height of patients. Methods The human lower limb model was simplified into a model of the bars. The activity of knee was as a dependent variable, and the individual body height, distance (S) and height (H) of seats, the crank length (L1) and speed ( ω1 ) were as the independent variables, and analysed with control variate method and MATLAB simulation analysis. Results Controlling the individual body height, all the other factors influenced the knee joint angle, angular velocity and angular acceleration value (initial or the end value). Among these factors, L1 impacted the mobility mostly, and less as S and H; ω1 mainly impacted the angular velocity and acceleration. Controlling the other factors as S=550 mm, H=165 mm, L1=180 mm, ω1 =10 r/s, the higher the body height would be, the less the knee joint activities, angular velocity and angular acceleration are. Conclusion It is necessary to adjust the height and distance of seats, crank length and the speed to meet the individual body height when training with MOTOmed for lower limbs rehabilitation.

Key words: MOTOmed, rehabilitation, lower limbs, knee, body height