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A comparative study of shoulder muscle strength, sense of proprioception and internal/external rotation flexibility between adolescent athletes with and without scapular asymmetry Cover

A comparative study of shoulder muscle strength, sense of proprioception and internal/external rotation flexibility between adolescent athletes with and without scapular asymmetry

Open Access
|Sep 2020

Figures & Tables

Comparison of demographic characteristics, professional experience and scapular asymmetry of the groups

Control group (n = 19)Asymmetry group (n = 19)z£, t¥p
Age (year)15.89 ± 1.7615.63 ± 2.17–0.687£0.492£
Weight (kg)54.16 ± 10.2356.44 ± 12.94–0.602¥0.551¥
Height (m)1.64 ± 0.111.64 ± 0.100.241¥0.811¥
BMI (kg/m2)19.86 ± 2.1720.82 ± 3.14–1.106¥0.276¥
Professional Experience (year)7.05 ± 2.917.71 ± 3.11-0.517£0.605£
Scapular Difference in Neutral Position (cm)0.39 ± 0.421.46 ± 0.70–4.312£<0.001£
Scapular Difference in 45° Abduction Position (cm)0.53 ± 0.381.21 ± 0.74–2.996£0.003£
Scapular Distance in 90° Abduction Position (cm)0.39 ± 0.391.14 ± 1.04–2.365£0.018£

Comparison of isokinetic and isometric muscle strength, proprioception sense and flexibility of the groups

Isokinetic Muscle StrengthControl Group (n = 19)Asymmetry Group (n = 19)z£, t¥pCohen’s D/r
60°/sec Angular VelocityDM ABD PT (Nm)50.57 ± 16.5649.54 ± 16.74–0.365£0.715£0.031
ND ABD PT (Nm)58.81 ± 13.3755.39 ± 15.00–0.818£0.414£0.106
DM ADD PT (Nm)53.61 ± 18.8750.62 ± 18.85–0.540£0.589£0.083
ND ADD PT (Nm)50.57 ± 17.9545.49 ± 17.400.886¥0.382¥0.287*
DM ADD/ABD RATIO (%)95.72 ± 13.10100.98 ± 21.51–0.511£0.609£–0.141
ND ADD/ABD RATIO (%)123.43 ± 30.31128.49 ± 30.10–0.978£0.328£–0.083
ABD SYMMERY INDEX (%)85.15 ± 13.5789.36 ± 18.35–0.423£0.672£–0.126
ADD SYMMERY INDEX (%)108.25 ± 18.98113.50 ± 22.28–1.095£0.274£–0.123
Isometric Muscle StrengthDominant Abduction (N)47.01 ± 22.4247.01 ± 20.52–0.307£0.759£0
Non-Dominant Abduction (N)47.69 ± 22.2050.60 ± 30.42–0.161£0.872£–0.056
Dominant Adduction (N)55.97 ± 23.1962.47 ± 30.98–0.497£0.619£–0.129
Non-Dominant Adduction (N)53.87 ± 22.3460.68 ± 31.50–0.769¥0.447¥0.249*
Proprioception Sense60° Dominant Error (°)5.15 ± 3.034.22 ± 4.34–1.621£0.105£0.140
60° Non-Dominant Error (°)5.17 ± 4.496.04 ± 3.28–0.876£0.381£–0.140
90° Dominant Error (°)4.30 ± 2.815.00 ± 3.32–0.964£0.335£–0.192
90° Non-Dominant Error (°)3.96 ± 2.804.20 ± 2.60–0.599£0.549£–0.242
120° Dominant Error (°)5.61 ± 4.345.33 ± 3.38–0.234£0.815£0
120° Non-Dominant Error (°)5.46 ± 3.864.24 ± 2.20–0.628£0.530£0.192
FlexibilityThumb T5 DM (cm)8.55 ± 4.3512.38 ± 4.28–2.369£0.018£–0.447
Thumb T5 ND (cm)10.97 ± 4.5314.28 ± 3.18–2.607¥0.013¥0.845*
Thumb C7 DM (cm)6.38 ± 2.985.24 ± 2.51–0.891£0.373£0.242
Thumb C7 ND (cm)5.92 ± 2.795.46 ± 2.14–0.526£0.559£0
Language: English
Page range: 1 - 7
Submitted on: Jul 27, 2020
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Accepted on: Sep 16, 2020
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Published on: Sep 19, 2020
In partnership with: Paradigm Publishing Services
Keywords:

© 2020 Bihter Akınoğlu, Banu Kabak, Aydin Balci, Tuğba Kocahan, Adnan Hasanoğlu, published by University of Physical Education in Warsaw
This work is licensed under the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 License.