The Relationship Between Knee Extensor Musculoarticular Stiffness And Pedaling Rate,Explosive During Sprint Cycling

Purpose: To investigate effect of knee extensor musculoarticular stiffness(MA Stiffness)during sprint cycling,analyze the relationship between MA stiffness and explosive power,pedaling force,maximum power output,maximum pedaling rate during sprint cycling under 4 types of resistance,realize the pedaling rate and explosive power when differ MA stiffness participants are cycling.To provide an important consideration for sprint cycling training,advice for cycling activity and the basis of talent selectionMethods: Unilateral MA stiffness of quadriceps was quantified 22 males high school students using an oscillation test,then were ranked on MA stiffness properties and were divided into a relatively stiff group(SG)and a relatively compliant group(CG).Maximal isometric torque(MIT)of knee angle of 100° and maximum pedaling force,the rate of force development,maximum pedaling rate,maximum power output and angle of peak force during 6s sprint cycling on 4 types of resistance.Use independent samples t-test and pearson product-moment correlations to analyze above statistics.Result: 1.MA stiffness was significantly correlated with MIT(r=0.88,p<0.01).2.Maximum pedaling rate and average pedaling rate were higher for the SG,significantly higher at magnetism level 3(P<0.05).3.Maximum pedaling force,the rate of force development,maximum power output was higher for SG,significantly higher at some cycling resistant types(P<0.05).4.Angle of peak force was no significant differ.Conclusions:1.MA stiffness can affect pedaling rate,pedaling force and explosive while sprint cycling.2.There was no significant differ between MA stiffness and Angle of peak force.3.Higher MA stiffness can play an important role on cycling rate,explosive strength and explosive during sprint cycling.