The Study On The Influence Of Different Stretching Mode And Delay Time On Sports Quality

Stretching is one of the important contents in competitive sports training and competition activities.The existing research shows that pulling can improve the performance of athletes’ learning,practice and improve the performance of mastered movements.Stretching has a positive effect in promoting the development of athletes’ body consciousness,improving the degree of relaxation of the body,reducing muscle tension,reducing joint muscle strain and muscle pain.However,in order to achieve good tensile effect,it is particularly important to choose a stretching mode.AIM: To explore the effects of experimental interventions(different stretching methods: static stretching,dynamic stretching,PNF stretching and foam rolling)on sports quality,through different test indicators to analyze the differences in the effects of different stretching mode on sports quality,and to observe the effects of different time points and providing theoretical and practical operational basis for the application of stretching methods for sports training and competition activities.METHODS: Using literature method,investigation method,interview method,experimental research method,mathematical statistics method,12 students from the Capital University of Physical Education and Sports who had no stretching habits at school.After 5 minutes of jogging,no stretching(N),static stretching(SS),dynamic stretching(DS),PNF stretching(PNF),foam rolling(FR),except for N,subjects were given four different intervention methods at the same time,and the degree of conscious exertion and pain level were quantified.The test contents of sit-and-reach,standing vertical jump,"T" running,30 m running were performed at different time points immediately after intervention,5 min,and 10 min.The test sequence is consistent.RESULTS:1.Static stretching,dynamic stretching,PNF stretching and foam rolling can significantly improve the sit-and-reach score(P < 0.05),5 minutes score is significantly higher than immediate and 10 minutes(P < 0.01),PNF stretching results were significantly higher than static stretching,dynamic stretching and foam rolling(P < 0.01).2.Dynamic stretching and foam rolling significantly improved the vertical jump performance in the immediate,5 minutes and 10 minutes(P < 0.01),and the dynamic stretching of the immediate and 5 minute results was significantly higher than the foam rolling(P < 0.01).Static stretching and PNF stretching significantly reduced the vertical jump performance in the immediate,5 and 10 minutes(P < 0.01),and the 10-minute static stretching and PNF stretching were not significantly different from the non-stretching group(P >0.05).3.The four stretching methods showed no significant difference in the “T” running performance immediately(P>0.05);dynamic stretching,PNF stretching and foam rolling significantly improved the “ T ” running score in 5 minutes(P < 0.05),the static stretching was improved but there was no significant difference(P>0.05);the four stretching methods significantly improved the“T”running score in 10 minutes(P<0.05),and the foam rolling to static stretching,dynamic stretching and PNF stretching decreased,but there was no significant difference(P>0.05).4.Dynamic stretching significantly improved the performance of 30m(P < 0.05),and the 5 minute score was significantly higher than immediate and 10 minutes(P <0.01).CONCLUSIONS:1.The effect of different stretching on flexibility: static stretching,dynamic stretching,PNF stretching and foam rolling have positive significance for flexibility.PNF stretching is superior to static stretching,dynamic stretching and foam rolling.Stretching is best for flexibility 5 minutes after intervention.2.The effect of different stretching on explosive force:dynamic stretching and foam rolling can effectively improve explosive force.Dynamic stretching is better than foam rolling,and has a certain duration of persistence.The effect of delaying for 5 minutes is the best;while static stretching or PNF stretching can inhibit the explosive force of lower limbs.The inhibitory effect of static stretching and PNF stretching decreased with time,and there was no difference between the group with a delay of 10 minutes and the group without stretch.3.The effect of different stretching on agility:the four methods have no acute effect on the agility;after 5 minutes delay,dynamic stretching,PNF stretching and foam rolling have positive effects on the agility,static stretching has no effect;after 10 minutes delay,static stretching,dynamic stretching,PNF stretching and foam rolling have positive significance for agility,the foam rolling effect begins to diminish.4.The effect of different stretching on speed: dynamic stretching has a positive effect on the speed performance,and the 5-minute effect is the best,and the 10-minute effect shows a downward trend than 5 minutes.Other stretches have no effect.5.Dynamic stretching is the best of the four methods to delay the performance of the test indicators of flexibility,explosive force,agility and speed.