In order to reduce the risk of shoulder imbalance and injury in junior tennis players,this study analyzed the effects of compensatory training on shoulder strength and internal rotation(IR)and external rotation(ER)range of motion(ROM).After the initial assessment,26 players were divided into a flywheel training group(FTG)and a control group(CG).Measured before and after 12 weeks of intervention training(3 times per week),the results showed significant changes in IR and ER on the dominant side and IR on the non-dominant side of FTG after intervention compared with CG.In terms of ROM value,compared with CG,FTG showed an increase in IR ROM and total ROM on the dominant and non-dominant side,and showed a greater increase in ER ROM on the non-dominant side.The compensatory training proposed in this study effectively increased the ER strength and IR flexibility of FTG players and improved ER-IR muscle balance,thereby reducing shoulder imbalance and injury.
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