EMG Analysis Of Pedaling In Track Cyclists

Purpose With the ongoing development of modern sports biomechanics methodologies, the neuromuscular analysis of pedaling techniques has been used. EMG is the ideal task to investigate the neuromuscular coordination. Constant power (250w) and moderate cadence (?120rpm) are the conditions of pervasive studies, which just content road cycling. Therefore, under track load of 4km, this study examined how EMG signal of lower limbs and antagonistic muscles change. The purpose was to enrich existing methods in sports biomechanics serving, so as to provide evidences for improving purposeful training in professional cyclists.Methods EMG data of seven muscles and crank angles were synchronically collected from ten track cyclists at 500w cross four pedaling cadences (100, 120, 130, and 140rpm). Onset, offset, period, duration, peak magnitude, and peak timing values were calculated, as were cross-correlation coefficients of four groups of mono- and bi-articular antagonist pairs.Conclusions RF burst significantly shifted earlier to endmost downstroke as greater cadences, which need other reason, in order to provide smooth propulsion through the stroke transitions near TDC. VL and GAS increased activity region significantly due to cadence. TA particularly exhibited double bursting patterns of activation, and on harmonic power transfer by GAS along with preventing knee hyperextension by greater VM action, frontal burst had more important function. The antagonistic mechanism between RF and GM showed polar changing due to cadence. Consistent positive correlation between BF and VL may administer to power transfer from knee to hip in downstroke. The significant negative correlation between...