Arm Swing during Vertical Jumps does not Increase EMG Activity of the Lower Limb Muscles

Arm swing improves vertical jump height but the underlying mechanism is not well understood. We assume that negative acceleration of arm can increase load and tension lower limb’s extensor muscles enhancing force output resulting in higher jump. The purpose this study was to examine how affects EMG activity limb during jumping relation kinematics. Sixteen physically active male college students were asked perform squat (SJ) countermovement jumps (CMJ) with arms akimbo swing. Jumps carried out on a platform while kinematic data right measured. Jumping increased by 33% SJ 18.9% CMJ when performed In ground reaction (GRF) larger (71–91% jump, p < 0.001) significantly slower relative joint extension. Similarly, CMJAS GRF (89–97% compared CMJ. time, net impulse take off velocity both jumps. No differences detected between without When swing, we observe indicate limb, cannot confirm our initial idea results comparison. Increase be explained extended time greater mechanical variables