Relationship between glenohumeral horizontal abduction angle and scapular internal rotation angle at maximum shoulder external rotation during baseball pitching
Background: Increased scapulothoracic (ST) internal rotation at maximum external rotation (MER) during baseball pitching can decrease glenohumeral (GH) horizontal adduction, leading to excessive GH horizontal abduction. However, few studies have examined this direct relationship, and none have inves...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-01-01
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| Series: | JSES International |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666638324003827 |
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| author | Yuki Nomura, PhD, PT Hajime Toda, PhD, PT, JSPO-AT Masaki Katayose, PhD, PT, JSPO-AT Shun Watanabe, MSc Masahiro Yoshida, PhD, PT, JSPO-AT Makoto Yoshida, PhD, PT, JSPO-AT Keizo Yamamoto, PhD |
| author_facet | Yuki Nomura, PhD, PT Hajime Toda, PhD, PT, JSPO-AT Masaki Katayose, PhD, PT, JSPO-AT Shun Watanabe, MSc Masahiro Yoshida, PhD, PT, JSPO-AT Makoto Yoshida, PhD, PT, JSPO-AT Keizo Yamamoto, PhD |
| author_sort | Yuki Nomura, PhD, PT |
| collection | DOAJ |
| description | Background: Increased scapulothoracic (ST) internal rotation at maximum external rotation (MER) during baseball pitching can decrease glenohumeral (GH) horizontal adduction, leading to excessive GH horizontal abduction. However, few studies have examined this direct relationship, and none have investigated the ST internal rotation angle at stride foot contact (FC) and MER. This study investigated the relationships between GH horizontal adduction and ST internal rotation angles at MER and between ST internal rotation angles at FC and MER. Methods: We recruited 15 asymptomatic collegiate baseball pitchers and assessed the ST internal rotation angle at FC and MER and GH horizontal adduction angle at MER during pitching using an optical motion tracking system. Pearson’s correlation coefficients determined the relationships between GH horizontal adduction and ST internal rotation angles at MER and between ST internal rotation angles at FC and MER. Results: The GH horizontal adduction angle at MER was significantly related to the ST internal rotation angle at MER (r = −0.58, P = .022). The ST internal rotation angle at FC was significantly related to the ST internal rotation angle at MER (r = 0.53, P = .045). Conclusions: The GH horizontal adduction angle at MER is associated with the ST internal rotation angle at MER in asymptomatic collegiate baseball pitchers, and the ST internal rotation angle at FC is related to the ST internal rotation angle at MER. Thus, the scapula and humerus should be controlled from FC to MER during pitching to reduce internal impingement risk in asymptomatic baseball pitchers. |
| format | Article |
| id | doaj-art-56bc2a19eba24ac48b87a55a71ac36e4 |
| institution | Kabale University |
| issn | 2666-6383 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | JSES International |
| spelling | doaj-art-56bc2a19eba24ac48b87a55a71ac36e42025-01-12T05:25:59ZengElsevierJSES International2666-63832025-01-01911217Relationship between glenohumeral horizontal abduction angle and scapular internal rotation angle at maximum shoulder external rotation during baseball pitchingYuki Nomura, PhD, PT0Hajime Toda, PhD, PT, JSPO-AT1Masaki Katayose, PhD, PT, JSPO-AT2Shun Watanabe, MSc3Masahiro Yoshida, PhD, PT, JSPO-AT4Makoto Yoshida, PhD, PT, JSPO-AT5Keizo Yamamoto, PhD6Department of Rehabilitation, Sapporo Maruyama Orthopedic Hospital, Sapporo City, Japan; School of Health Sciences, Sapporo Medical University, Sapporo City, Japan; Corresponding author: Yuki Nomura, PhD, PT, School of Health Sciences, Sapporo Medical University, West 11, South 5, Chuo-ku, Sapporo City 060-8556, Japan.School of Health Sciences, Sapporo Medical University, Sapporo City, JapanSchool of Health Sciences, Sapporo Medical University, Sapporo City, JapanSchool of Lifelong Sport, Hokusho University, Ebetsu City, JapanSchool of Lifelong Sport, Hokusho University, Ebetsu City, JapanSchool of Lifelong Sport, Hokusho University, Ebetsu City, JapanSchool of Lifelong Sport, Hokusho University, Ebetsu City, JapanBackground: Increased scapulothoracic (ST) internal rotation at maximum external rotation (MER) during baseball pitching can decrease glenohumeral (GH) horizontal adduction, leading to excessive GH horizontal abduction. However, few studies have examined this direct relationship, and none have investigated the ST internal rotation angle at stride foot contact (FC) and MER. This study investigated the relationships between GH horizontal adduction and ST internal rotation angles at MER and between ST internal rotation angles at FC and MER. Methods: We recruited 15 asymptomatic collegiate baseball pitchers and assessed the ST internal rotation angle at FC and MER and GH horizontal adduction angle at MER during pitching using an optical motion tracking system. Pearson’s correlation coefficients determined the relationships between GH horizontal adduction and ST internal rotation angles at MER and between ST internal rotation angles at FC and MER. Results: The GH horizontal adduction angle at MER was significantly related to the ST internal rotation angle at MER (r = −0.58, P = .022). The ST internal rotation angle at FC was significantly related to the ST internal rotation angle at MER (r = 0.53, P = .045). Conclusions: The GH horizontal adduction angle at MER is associated with the ST internal rotation angle at MER in asymptomatic collegiate baseball pitchers, and the ST internal rotation angle at FC is related to the ST internal rotation angle at MER. Thus, the scapula and humerus should be controlled from FC to MER during pitching to reduce internal impingement risk in asymptomatic baseball pitchers.http://www.sciencedirect.com/science/article/pii/S2666638324003827Scapular motionGlenohumeral motionInternal impingementBaseball playersThrowingMotion capture |
| spellingShingle | Yuki Nomura, PhD, PT Hajime Toda, PhD, PT, JSPO-AT Masaki Katayose, PhD, PT, JSPO-AT Shun Watanabe, MSc Masahiro Yoshida, PhD, PT, JSPO-AT Makoto Yoshida, PhD, PT, JSPO-AT Keizo Yamamoto, PhD Relationship between glenohumeral horizontal abduction angle and scapular internal rotation angle at maximum shoulder external rotation during baseball pitching JSES International Scapular motion Glenohumeral motion Internal impingement Baseball players Throwing Motion capture |
| title | Relationship between glenohumeral horizontal abduction angle and scapular internal rotation angle at maximum shoulder external rotation during baseball pitching |
| title_full | Relationship between glenohumeral horizontal abduction angle and scapular internal rotation angle at maximum shoulder external rotation during baseball pitching |
| title_fullStr | Relationship between glenohumeral horizontal abduction angle and scapular internal rotation angle at maximum shoulder external rotation during baseball pitching |
| title_full_unstemmed | Relationship between glenohumeral horizontal abduction angle and scapular internal rotation angle at maximum shoulder external rotation during baseball pitching |
| title_short | Relationship between glenohumeral horizontal abduction angle and scapular internal rotation angle at maximum shoulder external rotation during baseball pitching |
| title_sort | relationship between glenohumeral horizontal abduction angle and scapular internal rotation angle at maximum shoulder external rotation during baseball pitching |
| topic | Scapular motion Glenohumeral motion Internal impingement Baseball players Throwing Motion capture |
| url | http://www.sciencedirect.com/science/article/pii/S2666638324003827 |
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