Comparison of walking, muscle activity, and ground repulsion of treadmill walking and arm swing robot walking in normal adults

INTERVENTION: Others(Application of upper and lower limb walking assistance robots) : Three conditions are randomly applied to all subjects. Condition 1 is a treadmill walking robot, Condition 2 is a lower‐limb walking assistant robot, and Condition 3 is an upper and lower‐limb walking assistant robot. The robot is applied until the subject becomes familiar with the robot. (approximately 15 minutes) Apply once. CONDITION: Not Applicable PRIMARY OUTCOME: electromyography gait analysis SECONDARY OUTCOME: ground reaction force INCLUSION CRITERIA: (1) age between 20 and 39 years (2) No neurological disorder and/or orthopedic disorder (3) No experience with lower limb walking assisted robot (4) foot size between 240 and 260mm.