Percorrer por autor "Fernandes, Mariana José Azevedo"
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- Scapula position in volleyball players with and without infraspinatus atrophy in different arm positions: a cross-sectional studyPublication . Fernandes, Mariana José Azevedo; Magalhães, Bárbara dos Santos Nora; Montes, António Manuel Soares Mesquita; Carvalho, Paulo José MedeirosInfraspinatus atrophy (ISA) results from a mononeuropathy of the suprascapular nerve, that is common in volleyball players. The infraspinatus acts as a mobilizer and stabilizer of the shoulder and its atrophy can lead to positional and motion alterations of the shoulder complex. To compare scapular positioning in three static arm positions - rest, Hands in Head (HH) and Hands in Low Back (HLB) - between players with and without ISA and to relate these findings with ISA and overhead movements. Methods: An observational, analytical and cross-sectional study with a sample of 32 volunteer elite volleyball players. Data on shoulder range of motion (ROM) and torque ratios at 60 ˚/s were assessed with Biodex System 4 Pro, as well as scapular distances and angles were assessed with Qualysis Motion Capture System. The two independent samples t-test and Mann-Whitney U tests were used to compare groups, with a significance level of 0.05. 32 volleyball players divided into ISA (DIA, n= 14) and non-ISA (NDIA, n=18) groups. No significant differences were found in ROM and torque ratios at 60 ˚/s. ISA players had a higher lower horizontal distance in the non-dominant (NDOM) side at rest (p=0.032) and in the dominant (DOM) side in HH (p=0.029) and scapular lower angles distance at rest (p=0.029) and HH (p=0.032). A higher difference between DOM and NDOM sides of the upper horizontal distance (p=0.044) and upward rotation (p=0.040) was found. Players with ISA did not present alterations of ROM or torque ratios at 60 ˚/s, but demonstrated altered scapular positioning, specifically in the rest and HH position. It is necessary to differentiate these biomechanical adaptations associated with ISA from sport-specific adaptations, to specify and target the rehabilitation to the identified alterations.