| Research Objectives:Through the test of 5S,10 S and 30 S high-strength intermittent cycling on power bicycles,to study the variation characteristics of vertical jump height after high-strength intermittent cycling of different lengths,and to analyze the relationship between vertical jump height,heart rate,blood lactic acid and other indexes in 5s,10 S and 30 S high-strength intermittent cycling on power bicycles.Research Methods:His research adopts the literature data method,experiment method and mathematical statistics method and other research methods.Fifteen male college student volunteers(age:23.07±1.34 years old,height: 180.2±2.81 cm,weight: 74.14±6.70 kg,training years: 4.2±1.01years)from Capital University of Physical Education were selected to participate in this study.All the 15 subjects participated in 5S high-strength interval cycling,10 S high-strength interval cycling and 30 S high-strength interval cycling tests.High-strength interval cycling tests of different durations were conducted at an interval of 3 days.Power bike 5S high-strength intermittent riding test: 5S all-out riding intermittent 40 s,complete 3 groups of all-out riding;Power bike 10 s high-strength intermittent cycling test: 10 s intermittent cycling at full capacity,and 3 groups of full capacity cycling were completed;Power Bicycle 30 s High Strength Intermittent Riding Test: 30 30 s Intermittent Riding,complete 3 groups of all-out riding.In three different length of high-strength intermittent cycling were collected before and after the vertical jump height value,heart rate,blood lactic acid,and record the different time high strength in the process of the intermittent cycling power data and all the subjects were the Biceps femoris muscle in his right(Biceps femoris,BF),the muscle of(Vastus medialis,VM)and Vastus lateralis muscle(Vatsus lateralis,VL),the Rectus stocks(Rectus femoris,RF),Tibialis anterior muscle(Tibialis anterior,TA),Gastrocnemius(GAS),the EMG signal of six major muscles,calculate the peak power and average power.One-way ANOVA was used to compare the difference of vertical jump height,blood lactic acid,heart rate,power and EMG indexes in different duration high-intensity intermittent cycling.Then Pearson correlation analysis was used to examine the correlation between vertical jump height and blood lactic acid,vertical jump height and heart rate,heart rate and blood lactic acid,maximum power and average power.Results:1.In 5S high-strength intermittent cycling of power bicycle,maximum power increased by 12.16%,average power increased by 26.91%,the vertical jump height value by 4.4%,a83.11% increase in heart rate,blood lactic acid increased by 327%,the subjects,calf,shares the tibialis anterior muscle rectus muscle,the muscle of the biceps femoris muscle,vastus lateralis muscle of the root mean square(RMS)and amplitude integral electrical values(IEMG)has no obvious change.There was no correlation between longitudinal jump height and blood lactic acid(R=0.623,P>0.05),no correlation between longitudinal jump height and heart rate(R=0.547,P BBB>05),and there was a significant correlation between heart rate and blood lactic acid(R=0.531,P<0.01).There was no correlation between maximum power and average power(R=0.322,P BBB 0 0.05).2.In 10 S high-strength intermittent cycling of power bicycle,the maximum power decreased by 0.7%,the average power decreased by 11.34%,the vertical jump height decreased by 11.4%,the heart rate increased by 116%,and the blood lactic acid increased by606.84%.The root mean square amplitude(RMS)and integral electromyogram(IEMG)of the tibialis anterior muscle,gastrocnemius muscle,rectus femoris muscle,biceps femoris muscle,vastus medialis muscle and vastus lateralis muscle showed decreasing changes.There was a significant negative correlation between longitudinal jump height and blood lactic acid(R=-0.527,P<0.01),a significant negative correlation between longitudinal jump height and heart rate(R=-0.513,P<0.01),and a significant positive correlation between heart rate and blood lactic acid(R=0.624,P<0.01).There was no correlation between maximum power and average power(R=0.519,P>0.05).3.In the power bicycle 30 s high-strength intermittent cycling,the maximum power is reduced by 11.44%,the average power is reduced by 15.43%,the vertical jump height value is reduced by 26.9%,the heart rate is increased by 148%,and the blood lactic acid is increased by 764.38%.The root mean square amplitude(RMS)and integral electromyogram(IEMG)of the tibialis anterior muscle,gastrocnemius muscle,rectus femoris muscle,biceps femoris muscle,vastus medialis muscle and vastus lateralis muscle showed decreasing changes.There was a significant negative correlation between longitudinal jump height and blood lactic acid(R=-0.607,P<0.01),a significant negative correlation between longitudinal jump height and heart rate(R=-0.613,P<0.01),and a significant positive correlation between heart rate and blood lactic acid(R=0.572,P<0.01).There was no correlation between maximum power and average power(R=0.472,P BBB 0 0.05).4.In 5S,10 S and 30 S high-intensity interval cycling of power bicycle,the longitudinal jump height,heart rate and blood lactic acid value of subjects before participating in high-intensity interval cycling of different durations had no significant difference(P>0.05).After cycling,the vertical jump height,heart rate and blood lactic acid value were significantly different(P<0.01).Heart rate change: 5S high-intensity interval cycling < 10 S high-intensity interval cycling < 30 S high-intensity interval cycling.Change rate of vertical jump height: 5S high-strength interval cycling < 10 S high-strength interval cycling < 30 S high-strength interval cycling.Change rate of blood lactic acid value: 5S high-intensity interval cycling < 10 S high-intensity interval cycling < 30 S high-intensity interval cycling.From the aspect of sports performance,the maximum power change rate: 10 s high-strength intermittent cycling <30s high-strength intermittent cycling <5s high-strength intermittent cycling;Average power: 10 s high-strength intermittent cycling <30s high-strength intermittent cycling <5s high-strength intermittent cycling;The maximum power and average power of10 s and 30 s high-intensity intermittent cycling showed a decreasing trend,while the maximum power and average power of 5S high-intensity intermittent cycling showed an increasing trend.In terms of myoelectric changes: RMS value change rate: 5S high-intensity interval cycling < 30 S high-intensity interval cycling < 10 S high-intensity interval cycling;Change rate of IRMG value: 5S high-strength intermittent cycling < 30 S high-strength intermittent cycling < 10 S high-strength intermittent cycling.Research Conclusions:1.In the high-intensity interval cycling of different durations of power bicycles,there was no correlation between the change of vertical jump height after 5S high-intensity interval cycling and indexes such as blood lactic acid and heart rate,which could not sensitively reflect the state after exercise;There is a significant negative correlation between the change of vertical jump height and blood lactic acid after 10 s and 30 s of high-intensity interval cycling,which can reflect the state after exercise.2.In the high-intensity interval cycling of power bicycles with different duration,the monitoring of 5S high-intensity interval cycling by vertical jump height,blood lactic acid and heart rate has certain limitations.It is necessary to combine the changes of real-time indicators such as maximum power,average power,RMS and IEMG to carry out scientific monitoring of the whole process of high-intensity interval cycling more perfect.3.In the high-intensity intermittent cycling with different duration of power bicycle,the longer the duration of full-strength cycling,the more obvious the decrease of vertical jump height,the higher the increase of heart rate and the higher the increase of blood lactic acid.The change of the height of the vertical jump can be used as one of the monitoring indexes to judge whether the athletes will carry on the next practice. |
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