A Study On The Effects Of Functional Training On The Balance Of Shoulder Muscle Strength And Sports Performance Of College Students Majoring In Badminton

Objective : To explore the intervention effect of functional training on the balance of shoulder joint isokinetic muscle strength of college students majoring in badminton,and the impact of changes in shoulder joint muscle strength balance on Y balance testing and sports performance.This will provide certain data support for the teaching,training,and scientific research of badminton,and has practical significance for improving the level of scientific training.Methods: A total of 36 male students from the 2019 badminton general course at Chengdu Institute of Physical Education were selected and randomly divided into a control group(Group C,n=18 people)and an experimental group(Group S,n=18people).Group C: School professional teaching course training;Group S: Conduct12 weeks of functional training outside of the school’s professional teaching courses.Two groups of personnel were tested for shoulder joint isokinetic muscle strength,Y-balance,and motor performance before and after the experiment.The isokinetic muscle strength indicators included peak torque(PT),relative peak torque/body,weight(PT/BW),average power(AP),and total work(TW).Analyze the differences or correlations between the balance of upper limb shoulder joint muscle strength,Y balance,and motor performance indicators between Group C and Group S before and after the experiment.Result:(1)After functional training intervention,at an angular velocity of60 °/s,the P T,AP,and TW on the dominant side of the supinator muscle in Group S showed extremely significant differences compared to Group C(p<0.01);The non dominant side showed significant differences in PT/BW(p<0.05);When the angular velocity is 180 °/s,there is a significant difference in the PT and TW of the dominant side of the supinator muscle in Group S compared to Group C(p<0.05);The non dominant side showed significant differences in PT/BW(p<0.05);At an angular velocity of 240 °/s,the PT and PT/BW on the dominant side of the supinator muscle in Group S showed extremely significant differences compared to Group C(p<0.01);The non dominant side showed significant differences in PT/BW(p<0.05).(2)The PT of both internal and external rotator muscles in the S group showed a significant difference from before intervention(p<0.05)to no significant difference(p>0.05)at an angular velocity of 60°/s.(3)Before and after intervention,the strength of the ipsilateral internal rotator muscle was greater than that of the external rotator muscle.However,after 12 weeks of functional training intervention,the strength of the external rotator muscle in Group S increased,and the threshold range of traditional to functional ratio also increased.(4)Comparison of bilateral muscle balance of the shoulder joint before and after intervention showed that when the angular velocity was 60°/s,the difference in PT between the two sides of the S group decreased.(5)The results of the Y-balance test showed that in group S,except for the dominant lateral indicators,there were extremely significant differences in the comparison of other indicators before and after intervention(p<0.01);The proportion of people with a mean difference of more than 4 in the three directions of the bilateral Y balance test in Group S decreased compared to before the intervention.(6)After functional training intervention,the S group showed significant differences(p<0.01)compared to the C group in the long throw test on the dominant and non dominant side of badminton,the high and far throw test on the left and right areas of forehand serve,and the high and far throw test on the right area of forehand play.(7)The lateral difference of Y balance in group S was positively and moderately correlated with the balance of pronator force at an angular velocity of 60°/s(R=0.53,p<0.05);There is a highly positive correlation between the difference in pronator muscle strength(R=0.60,p<0.05)when the left high and far ball is served and the angular velocity is 240°/s.Conclusion:(1)There is a non equilibrium phenomenon in the maximum muscle strength of the dominant and non dominant rotator muscle groups,as well as the strength of the ipsilateral internal and external rotators of male college students majoring in badminton.This means that the strength of the dominant rotator muscle is always greater than that of the non dominant side,and the maximum strength of the internal rotator muscle is always greater than that of the external rotator muscle.(2)Functional training improves the maximum balance of muscle strength between bilateral rotator muscles of the same name and between unilateral primary and antagonistic muscles of the shoulder joint.(3)Functional training has a significant impact on the lateral and posterior medial indicators in the Y-balance test,and reduces the potential risk of upper limb injury.(4)Functional training has a positive effect on the sports performance indicators of male badminton general college students,but the correlation between the bilateral muscle strength balance of the shoulder joint and the sports performance indicators is weak,suggesting that the intervention of functional training on sports performance needs to consider the special characteristics and the balance of the antagonistic muscles on the overall dynamic chain.