Investigate Upper/Lower Trapezius Muscle Strength Ratio in Asymptomatic Adolescent Volleyball Players: A Pilot Study

Öz

Purpose: Purpose of this study was to investigate of upper/lower trapezius (U/L)muscle strength ratio which has an important role on overhead scapular mechanics of adolescent volleyball players at Turkish Volleyball Federation Sports Highschool.

Methods: Sixty students (32 women, 28 men) who are eligible and voluntary were included in this study. Isometric muscle strength was measured with hand-held dynamometer. Muscle strength tests were done as muscle specific when scapula was at the middle of muscle movement.

Results: Upper trapezius muscle strength was found higher on the dominant side compared to non-dominant side (p<0.05). Lower trapezius muscle strength was found higher on the non-dominant side compared to dominant side (p<0.05). U/L Trapezius muscle strength ratio was found 0.95 on dominant side and 0.88 on the non-dominant side. Scapular depression was found stronger on the non-dominant extremity (p<0.05) while the other extremity was stronger for scapular elevation (p<0.05).

Conclusion: As a result of this study, reference normative values of upper/lower trapezius muscle strength ratios in the adolescent volleyball players was determined. In order to our results, scapular muscle preferences of adolescent players have certain varieties between extremities. Dominant side which has stronger upper trapezius muscle makes us to think that the requirements of overhead mechanics can lead to scapular control alterations. These results can help to find the asymptomatic adolescent volleyball players who have higher risk of shoulder injuries.

Anahtar Kelimeler

• Adolescent,Volleyball,Scapula,Trapezius

Asemptomatik Adölesan Voleybolcularda Üst/Alt Trapez Kası Kuvvet Oranlarının İncelenmesi: Pilot Çalışma

Öz

Amaç: Bu çalışma Türkiye Voleybol Federasyonu Spor Lisesi’nde, 15-17 yaş grubu voleybol oyuncularında branşın içerdiği yoğun baş üstü aktivitelerin gerektirdiği skapular mekaniklerde önemli bir yere sahip olan üst/alt trapez kası kuvvet oranlarını belirlemek amacıyla yapıldı.

Yöntem: Gönüllü öğrenciler arasından çalışmaya dahil edilme kriterlerini sağlayan sporcu grubu 60 kişi (32 kadın, 28 erkek) olarak belirlendi. Üst ve alt trapez kas kuvvetini değerlendirmek için el dinamometresi ile izometrik kas kuvveti değerlendirmeleri uygulandı. Kas kuvvet testleri, skapulanın hareketinin orta açısında kasa spesifik olarak yapıldı.

Bulgular: Bu çalışmanın sonucunda üst trapez kas kuvvetinin dominant ekstremitede diğer ekstremiteye göre daha fazla olduğu görüldü (p<0,05). Alt trapez kas kuvveti ise dominant olmayan ekstremitede diğer ekstremiteye göre daha fazla bulundu (p<0,05). Üst/alt trapez kası kuvvet oranı dominant ekstremitede 0,95 bulunurken, dominant olmayan ekstremitede 0,88 olarak bulundu. Dominant olmayan ekstremitede skapula depresyonunun (p<0,05),dominant ekstremitede ise skapula elevasyonunun daha kuvvetli olduğunu gözlendi (p<0,05).

Sonuç: Bu çalışma ile adölesan voleybol oyuncularında üst/alt trapez kası kuvvet oranının asemptomatik sporcularda referans olabilecek ön verileri elde edildi. Bu sonuçlar, çalışmamızda yer alan adölesan sporcuların skapular kas kullanımının ekstremiteler arasında farklılıklara sahip olduğunu gösterdi. Dominant tarafta üst trapez kas kuvvetinin daha yüksek olması baş üstü mekaniklerin gereksinimlerinin skapula kontrolünü değiştirebileceği düşündürmektedir. Bu sonuçlar; yaralanma için risk altında bulunan asemptomatik adölesan voleybol oyuncularının belirlenmesine yardımcı olabilir.

Anahtar Kelimeler

• Adolesan,Voleybol,Skapula,Trapezius

Kaynakça

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