Many elderly and disabled persons use walking stick or handrail during walking. To evaluate the vertical force applied to the bottom of foot and the electromyography (EMG) of muscles in lower leg (rectus femoris,lateral gsstrocnemius, anterior tibial)during walking with the use of parallel bars, 2 groups of 6 healthy adults (group I) and 6 people with disorders of blood vessel in brain (group II) were used. The parameter used to set the parallel bars was the same used to set the height of walking stick or handrail in patients with disorders on the basis of the height of processus styloideus radii (i.e., around the wrist) or trochanter major (TM) (i.e., around hip joint) in a standing posture. In both groups, the walking task consisted in one cycle with two phases. In both phases, the right hand was gripping the parallel bar. The first phase, the left foot moved ahead and the second one, only the right foot moved. The cycle was alternated and successive.$B!!(BThe parallel bars were setting at the level, 5 cm above and below of TM . We observed the vertical force at the level of the TM in both groups I and II were significantly smaller than the value in the height 5 cm above the TM. The group I, the vertical force at a level 5cm below the TM was significantly smaller than that at 5cm above the TM. EMG data recorded from lateral gastrocnemius muscle at 5cm above and below were significantly larger than the same level of TM ,in group $B-5(B. The results suggested that use of parallel bars with a height of subject's TM for walking decreased vertical force applied to a foot, and increased EMG activities of lateral gastrocnemius muscle in the opposite side of the bar gripped by a subject's hand.