Shoulder Rotation Range of Motion and Serve Speed in Adolescent Male Volleyball Athletes: A Cross-Sectional Study.

Autor:	Telles R; Federal University of São Paulo., Cunha RA; Federal University of São Paulo., Yoshimura AL; Federal University of São Paulo., Pochini AC; Federal University of São Paulo., Ejnisman B; Federal University of São Paulo., Soliaman RR; Federal University of São Paulo.
Jazyk:	angličtina
Zdroj:	International journal of sports physical therapy [Int J Sports Phys Ther] 2021 Apr 01; Vol. 16 (2), pp. 496-503. Date of Electronic Publication: 2021 Apr 01.
DOI:	10.26603/001c.21243
Abstrakt:	Background: Throwing athletes present alterations in shoulder rotation range of motion (ROM), but not much is known about the relationship between these alterations and performance measurements in volleyball practitioners. Purpose: To compare the passive ranges of motion of internal rotation (IR), external rotation (ER), and total rotation motion (TRM) of the shoulder in dominant and nondominant limbs of young volleyball athletes and to investigate their relationship with ball speed during serves with and without precision (inside and outside court, respectively). The possible association of anthropometrics and competitive practice time with these velocities was also investigated. Study Design: Cross-sectional study. Methods: Fifty-seven male volleyball athletes (mean age 17.11 ± 1.88 y; weight 74.68 ± 9.7 kg; height 1.87 ± 0.09 cm) were evaluated for shoulder IR and ER with a bubble goniometer and serve speed inside and outside court was measured with a radar gun. Simple and multiple regression analyses were applied to investigate associations of ROM, anthropometrics, and competitive practice time with serve speed. Results: Dominant shoulders had diminished IR ROM compared to nondominant shoulders (59.1º ± 16.7º vs 66.4º ± 16.9º; p < 0.001) as well as diminished TRM (173.5º ± 31.8º vs 179.1º ± 29.9º; p < 0.001). Simple regression showed negative association between dominant ER and serve speed outside the court ( p = 0.004). Positive associations existed between age and serve speed in both conditions ( p < 0.001), BMI and speed inside ( p = 0.009) and outside the court ( p = 0.008), and between competitive practice time and speed inside ( p = 0.008) and outside court ( p = 0.003). However, multiple analysis confirmed only age ( p < 0.001) and BMI to be associated with ball velocities (inside court p = 0.034; outside court p = 0.031). Conclusion: The results of this study demonstrated that young volleyball athletes presented lower IR and TRM of the shoulder in the dominant upper limb. Age and BMI were directly associated with ball velocities when serving. Passive rotation ROM did not have a relationship with this performance measurement. Level of Evidence: 3b. Competing Interests: The authors have no conflict of interest to declare.
Databáze:	MEDLINE
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