Effect Of Postactivation Potentiation On The Lower Limps Power Of Basketball Athletes

Postactivation potentiation(PAP)is a phenomenon which refers to the acute augmentation of force and power production after a near-maximal voluntary contraction of skeletal muscle.It is a new type of preparation activity which is different from static stretching,dynamic stretching and PNF stretching.In basketball sport,lower limbs power is one of the important factors which affects the performance.Therefore,the purpose of this study was to explore the effect of the postactivation potentiation on the lower limbs power of basketball athletes by back squat.Significance:(1)It can provide a new idea to promote the maximum benefit of training and competition by exploring the acute and short-term effect of the postactivation potentiation on the lower limbs power of basketball athletes;(2)It can improve the study by exploring the postactivation potentiation of basketballSubjective:The purpose of this study was to analyze the acute and short-term effect of the postactivation potentiation on the lower limbs power of basketball athletes by back squat And this study can provide theory and practice basis for training and competitionMethods:This research use the literature material method,the experiment method and the mathematical statistics method and so on20 male basketball athletes(age=21.98±1.42years,average height=177.00±5.29cm,average weight = 70.91 ± 7.24kg,body mass index(BMI)=22.59±1.46kg/m2,training years=3.45±1.67 years)from Wuhan sports university were enrolled in this study.Subjects were randomly divided into the control group(n=10)and the experimental group(n=10)Before the experiment,subjects of the two groups performance 1RM back squat test and testing the baseline values.Control group subjects performance regular warm-up exercises,the experimental group subjects performance 3 sets of 3 repetitions of back squat at 85%1RM back squat exercises.Then completing the counter movement jump test,average power test,average force test,average velocity test,and the bilateral Gluteus Maximus,Vastus Medialis,Rectus Femoris and Vastus Lateralis electromyography signal test at immediately,3 min,6 min,9 min,12 min and 15 min.Then the Control group performance lower limbs strength training after regular warm-up exercises.The experimental group performance lower limbs strength training after the activation of back squat.After twice a week for 6 weeks for lower limbs strength training,all of the them performance 1RM back squat test again,and repeat the above test.Using repeative measurement anova to analyze each indicator data at different time points.Using paired samples T test to compare the indicators data of bafore and after intervention at the same time.Results:(1)In the study of postactivation potentiation,the back squat can not only produce acute enhancement effect of lower limb power,but also produce short-term enhancement effect.(2)Before intervention,the enhancement effect in the control group was superior to the experimental group.The former showed the best activation effect at the 3min,while the latter showed the best activation effect at the 6min.(3)After the intervention,the enhancement effect in the experimental group was better than experimental group,and the optimal time effect point in the experimental group was the same as that before the intervention.(4)The growth rate of 1RM back squat in the experimental group was higher than control group.Conclusion:(1)In the application of postactivation potentiation,back squat with load can produce acute effect.(2)There was no significant difference in squat 1RM between the experimental group and the control group after 6 weeks of lower limb strength training intervention.But there was an extremely significant difference between the pre-intervention group and the post-intervention group(P<0.01).(3)After 6 weeks training intervention,the experimental group can produce short-term effect.(4)After intervention,when the optimal activation time was observed at 6 min in the experimental group,the gluteus maximus has the strongest temporal effect at this point.(5)After 6 weeks of lower limb strength training intervention,the enhancement of lower limb power in the experimental group was better than the control group.