{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,23]],"date-time":"2026-01-23T07:48:21Z","timestamp":1769154501070,"version":"3.49.0"},"reference-count":48,"publisher":"Human Kinetics","issue":"1","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2026,2,1]]},"abstract":"<jats:p>\n                    Clarification of glenohumeral joint alignment changes during the late cocking phase may reveal the mechanisms of throwing injuries. This study aimed to determine the effect of shoulder external rotation on humeral head center deviation relative to the scapular glenoid. Twenty-eight baseball players participated. The anteroposterior deviation of the humeral head center relative to the glenoid (humeral head translation) and the distance between the humeral head and posterior glenoid rim perpendicular to the glenoid articular surface (posterior glenohumeral distance) were measured. Magnetic resonance imaging of the throwing shoulder was performed at 90\u00b0 abduction with 90\u00b0, 100\u00b0, and 110\u00b0 external rotation; for the nonthrowing shoulder, measurements were conducted at 90\u00b0 and 100\u00b0. In humeral head translation, the posterior translation of the humeral head relative to the glenoid was significantly greater at 110\u00b0 compared to 90\u00b0 external rotation position (\n                    <jats:italic>P<\/jats:italic>\n                    \u2009=\u2009.003). Humeral head translation was associated with posterior glenohumeral distance at the 90\u00b0 (\n                    <jats:italic>\u03b2<\/jats:italic>\n                    -coefficient\u2009=\u20090.649) and 100\u00b0 (\n                    <jats:italic>\u03b2<\/jats:italic>\n                    -coefficient\u2009=\u20090.556) external rotation positions. Increased shoulder external rotation resulted in posterior translation of the humeral head and proximity between the humeral head and the posterior glenoid rim. The factors identified as contributing to posterior deviation of the humeral head may trigger throwing shoulder injuries during the late cocking phase.\n                  <\/jats:p>","DOI":"10.1123\/jab.2025-0049","type":"journal-article","created":{"date-parts":[[2025,11,18]],"date-time":"2025-11-18T16:16:09Z","timestamp":1763482569000},"page":"44-49","source":"Crossref","is-referenced-by-count":0,"title":["Relationship Between Shoulder External Rotation and Glenohumeral Joint Alignment Changes in Baseball Players"],"prefix":"10.1123","volume":"42","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-8406-2054","authenticated-orcid":true,"given":"Makoto","family":"Takahashi","sequence":"first","affiliation":[{"name":"Department of Physical Therapy, School of Health Sciences, Japan University of Health Sciences, Satte-shi, Japan"},{"name":"Department of Rehabilitation, Hitachino Orthopedic Clinic, Ushiku-shi, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hirotaka","family":"Mutsuzaki","sequence":"additional","affiliation":[{"name":"Center for Medical Sciences, Ibaraki Prefectural University of Health Sciences, Ami-machi, Japan"},{"name":"Department of Orthopedic Surgery, Ibaraki Prefectural University of Health Sciences Hospital, Ami-machi, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Koji","family":"Iwamoto","sequence":"additional","affiliation":[{"name":"First Division of Physical Therapy, School of Health Sciences, Sapporo Medical University, Chuo-ku, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5314-5479","authenticated-orcid":true,"given":"Masahiko","family":"Monma","sequence":"additional","affiliation":[{"name":"Department of Radiological Sciences, Ibaraki Prefectural University of Health Sciences, Ami-machi, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9641-312X","authenticated-orcid":true,"given":"Makoto","family":"Nejishima","sequence":"additional","affiliation":[{"name":"Department of Physical Therapy, School of Rehabilitation Sciences, Seirei Christopher University, Chuo-ku, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0009-0002-3444-5123","authenticated-orcid":true,"given":"Tomoki","family":"Ono","sequence":"additional","affiliation":[{"name":"Department of Rehabilitation, Mejiro Orthopedics and Internal Medicine Clinic, Toshima-ku, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hiroshi","family":"Inami","sequence":"additional","affiliation":[{"name":"Department of Rehabilitation, Hitachino Orthopedic Clinic, Ushiku-shi, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4870-9257","authenticated-orcid":true,"given":"Masahiro","family":"Takemura","sequence":"additional","affiliation":[{"name":"Institute of Health and Sport Sciences, University of Tsukuba, Tsukuba-shi, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Takashi","family":"Kawamura","sequence":"additional","affiliation":[{"name":"Institute of Health and Sport Sciences, University of Tsukuba, Tsukuba-shi, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5550-7253","authenticated-orcid":true,"given":"Kazuhide","family":"Tomita","sequence":"additional","affiliation":[{"name":"Graduate School of Health Sciences, Ibaraki Prefectural University of Health Sciences, Ami-machi, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"100","reference":[{"issue":"5","key":"r1","series-title":"Am J Sports Med","doi-asserted-by":"publisher","first-page":"1024","DOI":"10.1177\/0363546508324966","article-title":"Internal impingement of the shoulder","volume":"37","author":"Heyworth BE","year":"2009","unstructured":"Heyworth BE, Williams RJ. 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