Study On Characteristics And Rehabilitation Of Scapular Dyskinesis In Sedentary Youth

Objectives: Sedentary behavior can cause abnormal neck and shoulder posture,affecting quality of life.This study aims to assess the relationship between the forward head posture,round shoulder posture and scapular dyskinesis in sedentary youth,to explore the recovery strategy of scapular dyskinesis in sedentary youth and observe the therapeutic effect as well as to provide new rehabilitation ideas for neck and shoulder pain of sedentary youth.Methods: Thirty-six sedentary youth with scapular dyskinesis were randomly divided into 3 groups: P group(n=12)received scapular control training and D1 extension and D2 flexion pattern training of PNF.S group(n=12)used scapular muscles strength training,both groups carried out lifestyle education,including muscle stretch and sitting posture education.C group(n=12)did not accept any intervention training and was given compensatory treatment after the experiment.Before and after six-week intervention,tested forward head angle,round shoulder angle,scapular index,lateral scapular slide test,shoulder flexibility test,muscle activation degree and activation ratio of scapular muscles,upper quarter Y-balance test and closed kinetic chain upper extremity stability test and analyzed the treatment effect.Results: Compared with pre-intervention:(1)The forward head angle and round shoulder angle of P group and S group significantly reduced,and there was no significant difference between both groups;(2)There was no significant difference in the scapular index between P group and S group;(3)The distance between both groups at 0 ° position in LSST decreased,the distance at 90°of P group decreased,and that of S group significantly reduced;(4)There was no significant change in P group and S group in maximal external rotation test,and maximal internal rotation test was significantly improved;(5)The UT-MVC% of P group and S group decreased,LT-MVC% increased and MT-MVC% increased;(6)The MVC% of UT decreased in shoulder flexion,abduction and towel wall slide of P group and S group,while MVC% of MT,LT and SA increased;UT/MT,UT/LT and UT/SA significantly decreased.Compared with S group,UT/MT and UT/LT in shoulder flexion of P group were significantly decreased,UT/SA decreased;(7)In Y-balance test,the medial line,superior-lateral line and composite score of P group and S group increased;(8)The number of touches,normalized score and power score of P group and S group in CUCKES test increased.No significant changes were observed in the C group.Conclusions:(1)Sedentary youth are prone to appear forward head and round shoulder postures,and show characteristics of scapular dyskinesis in upper limb activities.(2)PNF upper limb D1 extension and D2 flexion pattern can reduce the activation degree of the upper trapezius;increase activation of middle trapezius,lower trapezius and serratus anterior,improve scapular static position and movement patterns sedentary youth,promote shoulder function.(3)PNF technique is easy to learn,and the shoulder girdle muscle strength training both can be effective sports rehabilitation tools to effectively improve the scapular dyskinesis in sedentary youth.