{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2023,4,18]],"date-time":"2023-04-18T04:37:41Z","timestamp":1681792661766},"reference-count":25,"publisher":"Springer Science and Business Media LLC","issue":"5","license":[{"start":{"date-parts":[[2022,8,18]],"date-time":"2022-08-18T00:00:00Z","timestamp":1660780800000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"},{"start":{"date-parts":[[2022,8,18]],"date-time":"2022-08-18T00:00:00Z","timestamp":1660780800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"}],"funder":[{"DOI":"10.13039\/501100002839","name":"Charit\u00e9 - Universit\u00e4tsmedizin Berlin","doi-asserted-by":"crossref"}],"content-domain":{"domain":["link.springer.com"],"crossmark-restriction":false},"short-container-title":["Arch Orthop Trauma Surg"],"abstract":"<jats:title>Abstract<\/jats:title><jats:sec>\n                <jats:title>Introduction<\/jats:title>\n                <jats:p>The \u201cGlenohumeral Internal Rotation Deficit (GIRD)\u201d is known as the difference in internal rotation range of motion (IRRM) between the dominant and non-dominant shoulder of overhead athletes as a result of asymmetric loading. As in contrast loading pattern in gymnastics are quite symmetric and structural changes often occur bilaterally, the question arises if GIRD might develop bilaterally in gymnasts as one source of common bilateral shoulder pathologies and to search for underlying structural adaptations.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Materials and methods<\/jats:title>\n                <jats:p>A group of 35 elite gymnasts (8\u201324\u00a0years) were recruited from a local Olympic Training Centre and compared to a paired cohort of 28 non-overhead athletes. Clinical examinations, digital range of motion (ROM)-measurement, ultrasonographic humeral torsion measurement, and standardized MRI scans of both shoulders were obtained and examined for structural pathologies, cross-sectional areas (CSA) of the rotator cuff muscles and capsular thickness.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Results<\/jats:title>\n                <jats:p>ROM-measurements showed significant decrease in IRRM in the gymnasts groups by age, with IRRM of 48.6\u00b0 (SD: 8.4\u00b0, CI 95%: 43.0\u201354.3\u00b0) at age group 1 (8\u201310\u00a0years) and IRRM of 10\u00b0 (SD: 11.4\u00b0; CI 95%: 0\u201322.0\u00b0) at age group 4 (18\u201326\u00a0years), that was statistically significant for the entire cohort (<jats:italic>p<\/jats:italic>\u2009=\u20090.017) compared to the controls. CSA were not significantly different between the cohorts, while there was a slightly increased humeral retrotorsion in the gymnasts as well as a statistically significant posterior capsular thickening.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Conclusion<\/jats:title>\n                <jats:p>A new bilateral form of GIRD was identified in higher age groups of youth and senior elite gymnasts enrolled in this study. Despite to former definition of GIRD there was no compensatory increase in external rotation range of motion (ERRM) but an association with posterior capsular thickening, while there was no periscapular muscle hypertrophy. Humeral retrotorsion was also slightly increased in the gymnasts group.<\/jats:p>\n              <\/jats:sec>","DOI":"10.1007\/s00402-022-04577-0","type":"journal-article","created":{"date-parts":[[2022,8,18]],"date-time":"2022-08-18T17:17:38Z","timestamp":1660843058000},"page":"2599-2608","update-policy":"http:\/\/dx.doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Bilateral glenohumeral internal rotation deficit (GIRD) in elite gymnasts"],"prefix":"10.1007","volume":"143","author":[{"given":"Ralf J","family":"Doyscher","sequence":"first","affiliation":[]},{"given":"Leopold","family":"R\u00fchl","sequence":"additional","affiliation":[]},{"given":"Benjamin","family":"Czichy","sequence":"additional","affiliation":[]},{"given":"Konrad","family":"Neumann","sequence":"additional","affiliation":[]},{"given":"Timm","family":"Denecke","sequence":"additional","affiliation":[]},{"given":"Bernd","family":"Wolfarth","sequence":"additional","affiliation":[]},{"given":"Scott A","family":"Rodeo","sequence":"additional","affiliation":[]},{"ORCID":"http:\/\/orcid.org\/0000-0001-5452-7957","authenticated-orcid":false,"given":"Markus","family":"Scheibel","sequence":"additional","affiliation":[]}],"member":"297","published-online":{"date-parts":[[2022,8,18]]},"reference":[{"key":"4577_CR1","doi-asserted-by":"publisher","first-page":"324","DOI":"10.1080\/14763141.2011.650186","volume":"11","author":"EJ Bradshaw","year":"2012","unstructured":"Bradshaw EJ, Hume PA (2012) Biomechanical approaches to identify and quantify injury mechanisms and risk factors in artistic gymnastics. 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No.: EA2\/075\/17. The procedures used in this study adhere to the tenets of the Declaration of Helsinki.","order":3,"name":"Ethics","group":{"name":"EthicsHeading","label":"Ethical approval"}},{"value":"Informed consent was obtained from all study participants and parents (for those under the age of 18\u00a0years) before enrolling into the study.","order":4,"name":"Ethics","group":{"name":"EthicsHeading","label":"Informed consent"}},{"value":"The authors affirm that human research participants provided informed consent for anonymous publication of their images and study results.","order":5,"name":"Ethics","group":{"name":"EthicsHeading","label":"Consent for publication"}},{"value":"Standards of reporting adhere to STROBE recommendations.","order":6,"name":"Ethics","group":{"name":"EthicsHeading","label":"Standards of reporting"}}]}}