Asymmetry and evolution over a one-year period of the upward rotation of the scapula in youth baseball pitchers
The pitching motion is an asymmetric action by which coordination of scapular rotation in the dominant arm might be affected in time and in comparison with the non-dominant arm. The study aimed to compare asymmetry and the evolution of scapular upward rotation over a one-year period. Data were colle...
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Online Access: | http://dx.doi.org/10.1080/23335432.2018.1499441 |
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doaj-23735429aa804220bf261d0e46131bc72021-03-02T16:11:14ZengTaylor & Francis GroupInternational Biomechanics2333-54322018-01-0151576210.1080/23335432.2018.14994411499441Asymmetry and evolution over a one-year period of the upward rotation of the scapula in youth baseball pitchersErik van der Graaff0Bengt Kom1Femke van Dis2Xavier Gasparutto3Marco Hoozemans4Dirkjan Veeger5Vrije Universiteit Amsterdam, Amsterdam Movement SciencesVrije Universiteit Amsterdam, Amsterdam Movement SciencesVrije Universiteit Amsterdam, Amsterdam Movement SciencesDelft University of TechnologyVrije Universiteit Amsterdam, Amsterdam Movement SciencesVrije Universiteit Amsterdam, Amsterdam Movement SciencesThe pitching motion is an asymmetric action by which coordination of scapular rotation in the dominant arm might be affected in time and in comparison with the non-dominant arm. The study aimed to compare asymmetry and the evolution of scapular upward rotation over a one-year period. Data were collected twice, before and after a one-year period, from 92 participants (age = 15.1 SD 1.4 years, body height = 177.3 SD 10.9 cm, body weight 69.2 SD 14.5 kg). Scapular motion was tracked at different glenohumeral angles of elevation in the scapular plane: anatomical position (0°), 45°, 90° and 135°. Scapular upward rotation was calculated as the angle between the spinae scapula and the spine. Scapular upward rotation of the dominant arm was 5.1° (95% CI: 2.1°−8.1°) more compared to the non-dominant arm. Age group or glenohumeral angles of elevation did not affect this difference. Scapular upward rotation of the dominant arm decreased 1.9° (95% CI: −0.5° to 4.3°) after a one-year period, however, neither this observation, nor the interaction with age group or elevation angle was significant. These findings may indicate that pitchers could be at risk to develop shoulder injuries especially those that have been associated with scapular asymmetry.http://dx.doi.org/10.1080/23335432.2018.1499441pitchingbaseballoverhead throwingscapular upward rotationscapular dyskinesis |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Erik van der Graaff Bengt Kom Femke van Dis Xavier Gasparutto Marco Hoozemans Dirkjan Veeger |
spellingShingle |
Erik van der Graaff Bengt Kom Femke van Dis Xavier Gasparutto Marco Hoozemans Dirkjan Veeger Asymmetry and evolution over a one-year period of the upward rotation of the scapula in youth baseball pitchers International Biomechanics pitching baseball overhead throwing scapular upward rotation scapular dyskinesis |
author_facet |
Erik van der Graaff Bengt Kom Femke van Dis Xavier Gasparutto Marco Hoozemans Dirkjan Veeger |
author_sort |
Erik van der Graaff |
title |
Asymmetry and evolution over a one-year period of the upward rotation of the scapula in youth baseball pitchers |
title_short |
Asymmetry and evolution over a one-year period of the upward rotation of the scapula in youth baseball pitchers |
title_full |
Asymmetry and evolution over a one-year period of the upward rotation of the scapula in youth baseball pitchers |
title_fullStr |
Asymmetry and evolution over a one-year period of the upward rotation of the scapula in youth baseball pitchers |
title_full_unstemmed |
Asymmetry and evolution over a one-year period of the upward rotation of the scapula in youth baseball pitchers |
title_sort |
asymmetry and evolution over a one-year period of the upward rotation of the scapula in youth baseball pitchers |
publisher |
Taylor & Francis Group |
series |
International Biomechanics |
issn |
2333-5432 |
publishDate |
2018-01-01 |
description |
The pitching motion is an asymmetric action by which coordination of scapular rotation in the dominant arm might be affected in time and in comparison with the non-dominant arm. The study aimed to compare asymmetry and the evolution of scapular upward rotation over a one-year period. Data were collected twice, before and after a one-year period, from 92 participants (age = 15.1 SD 1.4 years, body height = 177.3 SD 10.9 cm, body weight 69.2 SD 14.5 kg). Scapular motion was tracked at different glenohumeral angles of elevation in the scapular plane: anatomical position (0°), 45°, 90° and 135°. Scapular upward rotation was calculated as the angle between the spinae scapula and the spine. Scapular upward rotation of the dominant arm was 5.1° (95% CI: 2.1°−8.1°) more compared to the non-dominant arm. Age group or glenohumeral angles of elevation did not affect this difference. Scapular upward rotation of the dominant arm decreased 1.9° (95% CI: −0.5° to 4.3°) after a one-year period, however, neither this observation, nor the interaction with age group or elevation angle was significant. These findings may indicate that pitchers could be at risk to develop shoulder injuries especially those that have been associated with scapular asymmetry. |
topic |
pitching baseball overhead throwing scapular upward rotation scapular dyskinesis |
url |
http://dx.doi.org/10.1080/23335432.2018.1499441 |
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