Juchumseo Jireugi motion is a stretching out of the fist forward quickly and moderately .
At this point muscle activation was measured while performing Jireugi motion in the Juchumseogi posture .
Jireugi   motion is a stretching out of the fist forward quickly and moderately .
At this point muscle activation was measured while performing Jireugi motion in the Juchumseogi posture .