Asymmetry and evolution over a one-year period of the upward rotation of the scapula in youth baseball pitchers

Erik van der Graaff, Bengt Kom, Femke van Dis, Xavier Gasparutto, Marco Hoozemans, Dirkjan Veeger

Research output: Contribution to JournalArticleAcademicpeer-review

Abstract

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.

Original languageEnglish
Pages (from-to)57-62
JournalInternational Biomechanics
Volume5
Issue number1
DOIs
Publication statusPublished - 2018

Fingerprint

Baseball
Scapula
Age Groups
Body Height
Spine
Body Weight

Keywords

  • baseball
  • overhead throwing
  • Pitching
  • scapular dyskinesis
  • scapular upward rotation

Cite this

@article{668b5d57cdda4e54b5b24ca35057ef2a,
title = "Asymmetry and evolution over a one-year period of the upward rotation of the scapula in youth baseball pitchers",
abstract = "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.",
keywords = "baseball, overhead throwing, Pitching, scapular dyskinesis, scapular upward rotation",
author = "{van der Graaff}, Erik and Bengt Kom and {van Dis}, Femke and Xavier Gasparutto and Marco Hoozemans and Dirkjan Veeger",
year = "2018",
doi = "10.1080/23335432.2018.1499441",
language = "English",
volume = "5",
pages = "57--62",
journal = "International Biomechanics",
issn = "2333-5432",
publisher = "Taylor and Francis Ltd.",
number = "1",

}

Asymmetry and evolution over a one-year period of the upward rotation of the scapula in youth baseball pitchers. / van der Graaff, Erik; Kom, Bengt; van Dis, Femke; Gasparutto, Xavier; Hoozemans, Marco; Veeger, Dirkjan.

In: International Biomechanics, Vol. 5, No. 1, 2018, p. 57-62.

Research output: Contribution to JournalArticleAcademicpeer-review

TY - JOUR

T1 - Asymmetry and evolution over a one-year period of the upward rotation of the scapula in youth baseball pitchers

AU - van der Graaff, Erik

AU - Kom, Bengt

AU - van Dis, Femke

AU - Gasparutto, Xavier

AU - Hoozemans, Marco

AU - Veeger, Dirkjan

PY - 2018

Y1 - 2018

N2 - 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.

AB - 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.

KW - baseball

KW - overhead throwing

KW - Pitching

KW - scapular dyskinesis

KW - scapular upward rotation

UR - http://www.scopus.com/inward/record.url?scp=85053343438&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85053343438&partnerID=8YFLogxK

U2 - 10.1080/23335432.2018.1499441

DO - 10.1080/23335432.2018.1499441

M3 - Article

VL - 5

SP - 57

EP - 62

JO - International Biomechanics

JF - International Biomechanics

SN - 2333-5432

IS - 1

ER -