Study On The Post-activation Potentiation Of Different Inertia Flywheel Eccentric Training On The Running And Jumping Ability Of Lower Limbs

PurposeThis study aims to test the subjects in different inertia flywheel eccentric training after the recovery time point of the lower extremities and running ability index(countermovement jump height,countermovement jump power,30 meters run time),the comparison and analysis of inertial load and recovery time for the flywheel eccentric activation after induction training,enhance the effect by training for the athletes use flywheel eccentric induced after activation enhanced effect of explosive force training or provide certain reference before the activation.MethodsRecruit and select 15 sports male college students with a certain level of strength and training experience.Before each test,first perform a lower limb countermovement jump or a 30-meter baseline test,arranged in the form of random cross subjects after the flywheel trainers on 0.04 kg·m~2and 0.08kg·m~2and 0.10kg·m~2three different inertia of crouch training(include two blank contrast),again at 4 minutes,8 minutes,12 minutes,and 16 minutes after the intervention Perform a lower limb countermovement jump or a 30-meter run test.Each subject is required to take 8 tests at least 48 hours apart.The obtained lower limb countermovement jump height,peak power,and 30-meter run time are analyzed by two-factor repeated measurement variance analysis to compare different inertias.The effects of post-activation potentiation at different recovery time points on lower limb vertical jump height,peak power,and 30-meter running performance were different.Result(1)The post-activation potentiation induced by inertia of 0.04kg·m~2was extremely significant(P<0.01)in the 4th and 8th minutes,which increased the countermovement jump height;the post-activation potentiation induced by inertia of0.08kg·m~2significantly increased the countermovement jump height at the 4th minute(P<0.05),and significantly increased the countermovement jump height at the 8th minute(P<0.01);The post-activation potentiation induced by inertia of 0.10kg·m~2increased the countermovement jump height significantly(P<0.05)at the 8th minute.(2)At the 4th minute,there was an extremely significant difference between the countermovement jump height induced by inertia of 0.04kg·m~2and that induced by inertia of 0.10kg·m~2(P<0.01);At the 8th,12th and 16th minutes,there was no statistical difference in the countermovement jump height induced by inertia.(3)The post-activation potentiation induced by inertia of 0.04kg·m~2was extremely significant(P<0.01)in the 4th minute,and significantly increased the peak power of countermovement jump in the 8th and 12th minutes(P<0.05);The post-activation potentiation induced by inertia of 0.08kg·m~2was extremely significant(P<0.01)in the 8th minute,and significantly increased the peak power of countermovement jump in the 4th and 12th minutes(P<0.05);The post-activation potentiation induced by inertia of 0.10kg·m~2significantly increased the peak power of the countermovement jump at 8 min(P<0.05).(4)At 4 minutes,0.04kg·m~2inertia induced countermovement jump peak power and 0.08kg·m~2inertia induced countermovement jump peak power exists significant difference(P<0.05);and 0.10kg·m~2inertia induced countermovement jump peak power is a very significant difference(P<0.01);while in 8,12,16 minutes each inertia induced by vertical jump had no statistical difference between peak power.(5)The post-activation potentiation induced by inertia of 0.04kg·m~2was extremely significant in the 4th and 8th minutes(P<0.01),which improved the performance of the 30-meter race;the post-activation enhancement effect induced by inertia of 0.08kg·m~2was significant in the 8th minute(P<0.05),which improved the performance of the 30-meter race;and The post-activation potentiation induced by inertia of 0.10kg·m~2was significant in the 4th minute(P<0.05),which decreased the performance of the 30-meter race.(6)At the 4th minute,the results of the 30-meter run induced by inertia of0.10kg·m~2were significantly different from those of the 30-meter run induced by inertia of 0.04kg·m~2and 0.08kg·m~2(P<0.01);At the 8th minute,there was an extremely significant difference(P<0.01)between the 30 meter run induced by0.108kg·m~2inertia and the 30 meter run induced by 0.04kg·m~2inertia(P<0.05);while there was no significant difference between the 30 meter run induced by0.08kg·m~2inertia at the 12th and 16th minutes.Conclusion:(1)The 0.04kg·m~2and 0.08kg·m~2inertial flywheel training can induce the post-activation potentiation to improve the ability of lower limb vertical jump and30-meter sprint,but the post-activation potentiation induced by 0.10kg·m~2inertial flywheel training can only improve the ability of lower limb vertical jump.(2)The post-activation potentiation induced by flywheel half-squat training with different inertia has some differences on the impact of lower limb jumping and30-meter sprint ability.In the 4-8 minutes after induction,0.04kg·m~2and 0.08kg·m~2inertia are more likely to induce a strong the post-activation potentiation than0.10kg·m~2inertia.(3)The optimal recovery time of the post-activation potentiation induced by different inertial flywheel half-squats is not exactly the same,and the duration of the optimal induction effect point and the optimal recovery time also have some differences,but the optimal recovery time generally appears in the 4th to 8th minute after induction.