The Influence Of Different Stretching Methods And Combinations On The Function Of Lower Limb Muscles

Stretching is an important and indispensable part of preparatory activities.Scientific stretching can improve the elasticity and extensibility of muscles,reduce muscle viscosity,prevent sports injury,improve sports ability,and also be beneficial to achieve good sports results.The field of competitive sports attaches great importance to the role of stretching,but different stretching methods may obtain different stretching effects,so scientific stretching is very important for athletic performance.In the field of public fitness,insufficient understanding of the role and methods of stretching exercises has resulted in a high incidence of acute and chronic sports injuries in the process of public fitness,affecting the improvement of sports ability and participation in physical activities,and thereby affecting the development of physical health.At present,the commonly used stretching methods include static stretching,dynamic stretching,PNF stretching and the combination of different stretching methods.Stretching can help prevent sports injury and improve lower limb exercise ability,but there are different opinions on the effect of different stretching.Therefore,it is necessary to clarify the effects of various common stretching methods and their combinations on the working ability of muscles.This study aims to study the influence of different combinations of stretching on lower limb motor ability through experimental methods,so as to provide theoretical basis for selecting appropriate combinations of stretching and improving motor ability in competitive and mass fitness sports.In this study,nine different combinations of stretching interventions were carried out on subjects to analyze the variation characteristics of lower limb flexibility,explosive force and muscle response after stretching.Stretching method respectively: static stretching and dynamic stretching,PNF stretching,static stretching/dynamic stretching/PNF stretching,static stretching/PNF stretching/dynamic stretching and dynamic stretching/PNF stretching/static stretching and dynamic stretching/static stretching/PNF stretching,PNF stretching/static stretching/dynamic stretching,PNF stretching/dynamic stretching/static stretching,and the different combination of tensile instantly,5 min,10 min after different postponement of lower limbs flexibility,explosive force and muscle reaction time when thetest results are compared.Main results of this study:(1)the influence of stretching on the working ability of lower limb muscles.By comparing the effects of non-stretching and different combinations of stretching on the motor ability of lower limbs,except that PNF combination of stretching has no significant difference in the impact of muscle response compared with pretest,other combinations of stretching have significant difference compared with non-stretching(P<0.05).(2)the influence of different combinations of stretching on the working ability of lower limbs.In different stretching combinations,the "dynamic stretching" combination has the highest degree of mobilization of related muscles.PNF stretch had the most significant effect on the improvement of sit-forward flexion(P<0.05).The effect of "dynamic stretch /PNF stretch/static stretch" combination on improving the maximum output power is significantly better than other combinations(P<0.05).The combination of "static stretch/dynamic stretch/PNF stretch" and "PNF stretch/static stretch/dynamic stretch" has a more obvious lifting effect on muscle response(P<0.05).The combination of "PNF stretch/static stretch/dynamic stretch" and "dynamic stretch /PNF stretch/static stretch" is significantly superior to other combinations of stretch in terms of flexibility and explosive force(P<0.05).(3)comparison of the stretching effect of different delay time after stretching.Effects of different combinations of stretching and delay time on flexibility: there was a significant difference between the static stretching delay time of 0min and 10min(P<0.05).There were significant differences in the other combinations after stretching for 0min,10 min,5min and10min(P<0.05).The influence of different delay time on explosive force in the stretching combination: "static stretching /PNF stretching/dynamic stretching,dynamic stretching/static stretching /PNF stretching" the delay time in the combination was not significantly different between 0min and 5min,while other combinations were significantly different between 0min and 5min(P<0.05).There was a significant difference between the combined tensile strength at 0min and 10min(P<0.05).There was no significant difference between the static tensile delay of 5min and 10 min,but there was significant difference between the other combinations of 5min and 10min(P<0.05).The effect of different delay time on muscle reaction time ofstretch combination: "PNF stretch,static stretch/dynamic stretch /PNF stretch,static stretch/PNF stretch/dynamic stretch,PNF stretch/static stretch/dynamic stretch" combination has significant difference between 0min and 5min(P<0.05),and there is no significant difference between other stretch combinations.Research conclusion:(1)compared with non-stretching,stretching exercises can improve the flexibility,explosive power and muscle mobilization ability of lower limbs to varying degrees.(2)the comparison of different methods and stretching effects of different combinations shows that different combinations of stretching have different effects on the motor ability of lower limbs,and most of the combined methods have more obvious effects than the single methods.(3)in the influence of different delay time on lower limb movement ability,it was found that there were differences in the delay time of stretching effect,and most of them reached the best state within five minutes after stretching.