Adölesan Tenisçilerde Tenis Oynama Yılına Göre Kalça Kas Kuvvet Profillerinin Sağlıklı Sedanterlerle Karşılaştırılması
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Yalkı S., Comparison of Hip Muscle Strength Profiles with Healthy Sedentaries in Adolescent Tennis Players by Year of Playing Tennis, Hacettepe University, Graduate School of Health Sciences, Master Thesis in Orthopedic Physiotherapy and Rehabilitation Program, Ankara, 2019. The aim of this study was to investigate the hip muscle strength profiles of adolescent tennis players according to the tennis-playing year and to compare the results with healthy sedentary adolescents (controls). Twenty-two tennis players with 3-5 years of experience, 25 tennis players with 6-8 years of experience and 25 healthy sedentary adolescent at similar age, height, body weight, who had no history of hip injuries were included in the study. Hip abduction-external rotation (Stabilizasyon) strength; abductor; adductor; flexor; extensor; internal and external rotator isometric muscle strengths were measured by hand dynamometer (Nicholas Manual Muscle Tester, Lafayette Indiana Instruments). Strength ratios and hip symmetry indices (HSI) were calculated. Femoral anteversion angle (FAA) was evaluated by using Craig’s Test. All evaluations were applied bilaterally. Demographic characteristics among groups were similar (p>0.05). The extensor muscle strength of 6-8 years experienced tennis players was higher than 3-5 years experienced players (p<0.05). Hip adductor, extensor, internal and external rotator, stabilizasyon muscle strength of 6-8 years experienced tennis players were higher than controls (p <0.05). Only hip internal rotator muscle strength was higher in 3-5 years experienced tennis players when compared to controls (p<0.05). Hip flexor/extensor strength ratio in both tennis groups was higher and abductor/adductor strength ratio in 6-8 years experienced tennis players was higher than controls (p<0.05). The extensor HSI in 6-8 years experienced tennis players was higher than 3-5 years experienced players (p <0.05). There was no difference in bilateral comparisons of FAA (p>0.05). These results showed that as the playing year increases, the hip muscle strength increases; the muscle strength ratios and HSI values differ. In the adolescent period, due to the growing musculoskeletal system, sports-specific adaptations might occur in tennis players. Determining these adaptations and planning the suitable exercise programs are very important in preventing future injuries.