{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,15]],"date-time":"2026-10-15T18:11:21Z","timestamp":1792087881930,"version":"4.4.0"},"reference-count":18,"publisher":"SAGE Publications","issue":"3","license":[{"start":{"date-parts":[[2009,1,27]],"date-time":"2009-01-27T00:00:00Z","timestamp":1233014400000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Am J Sports Med"],"published-print":{"date-parts":[[2009,3]]},"abstract":"<jats:sec>\n                    <jats:title>Background<\/jats:title>\n                    <jats:p>Windmill pitching produces high forces and torques at the shoulder and elbow, making the biceps labrum complex susceptible to overuse injury. Little is known about the muscle firing patterns during a windmill pitch.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Hypothesis<\/jats:title>\n                    <jats:p>Biceps muscle activity is greater during a windmill pitch than during an overhand throw.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Study Design<\/jats:title>\n                    <jats:p>Descriptive laboratory study.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>Seven female windmill pitchers underwent motion analysis and surface electromyography evaluation of their biceps muscles during windmill and overhand throwing. Marker motion analysis, muscle activity, and ball release were captured simultaneously. Surface electromyography trials were collected and related to the athletes\u2019 phases of pitching and throwing, identified based on predefined softball and baseball pitching mechanics.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>Throws were of similar velocity (24 m\/s, 53 mph, P =. 71), but peak biceps brachii muscle activation during the windmill pitch was significantly greater than during the overhand throw when normalized (38% vs 19% manual muscle test, P =. 02). The highest muscle activity occurred at the 9-o'clock phase of the windmill pitch, during which the biceps brachii undergoes eccentric contraction. In the overhand throw, the highest level of biceps activity occurred during arm cocking.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>In female athletes, biceps brachii activity during the windmill pitch is higher than during an overhand throw and is most active during the 9-o'clock and follow-through phases of the pitch.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Clinical Relevance<\/jats:title>\n                    <jats:p>Repetitive eccentric biceps contractions may help explain the high incidence of anterior shoulder pain clinically observed in elite windmill pitchers. Injury prevention and treatment mechanisms should focus on the phases with the highest muscle activity.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1177\/0363546508328105","type":"journal-article","created":{"date-parts":[[2009,1,27]],"date-time":"2009-01-27T23:26:41Z","timestamp":1233098801000},"page":"558-565","source":"Crossref","is-referenced-by-count":79,"title":["Biceps Activity during Windmill Softball Pitching"],"prefix":"10.1177","volume":"37","author":[{"given":"Idubijes L.","family":"Rojas","sequence":"first","affiliation":[{"name":"Department of Orthopedic Surgery, Rush University Medical Center, Chicago, Illinois"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Matthew T.","family":"Provencher","sequence":"additional","affiliation":[{"name":"Naval Medical Center San Diego, San Diego, California"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sanjeev","family":"Bhatia","sequence":"additional","affiliation":[{"name":"Midwest Orthopaedics, Rush University Medical Center, Chicago, Illinois"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kharma C.","family":"Foucher","sequence":"additional","affiliation":[{"name":"Department of Orthopedic Surgery, Rush University Medical Center, Chicago, Illinois"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"suffix":"Jr","given":"Bernard R.","family":"Bach","sequence":"additional","affiliation":[{"name":"Midwest Orthopaedics, Rush University Medical Center, Chicago, Illinois"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Anthony A.","family":"Romeo","sequence":"additional","affiliation":[{"name":"Midwest Orthopaedics, Rush University Medical Center, Chicago, Illinois"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Markus A.","family":"Wimmer","sequence":"additional","affiliation":[{"name":"Department of Orthopedic Surgery, Rush University Medical Center, Chicago, Illinois"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nikhil N.","family":"Verma","sequence":"additional","affiliation":[{"name":"Midwest Orthopaedics, Rush University Medical Center, Chicago, Illinois"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"179","published-online":{"date-parts":[[2009,1,27]]},"reference":[{"key":"bibr1-0363546508328105","doi-asserted-by":"publisher","DOI":"10.2519\/jospt.1998.28.6.405"},{"key":"bibr2-0363546508328105","volume-title":"Introduction to Surface Electromyography","author":"Cram JR","year":"1998"},{"key":"bibr3-0363546508328105","volume-title":"Surface electromyography: detection and recording","author":"De Luca CJ","year":"2008"},{"key":"bibr4-0363546508328105","doi-asserted-by":"publisher","DOI":"10.1177\/0363546506293025"},{"key":"bibr5-0363546508328105","doi-asserted-by":"publisher","DOI":"10.1177\/036354659502300218"},{"key":"bibr6-0363546508328105","unstructured":"FleisigGS, EscamillaRF, BarrentineSWBiomechanics of pitching: mechanism and motion analysis. In: AndrewsJR, ZarinsB, WilkKE, eds. Injuries in Baseball. Philadelphia, PA: Lippincott Raven;1998:3\u201322."},{"issue":"4","key":"bibr7-0363546508328105","first-page":"36","volume":"30","author":"Flynn M.","year":"1995","journal-title":"Parks Recreation"},{"key":"bibr8-0363546508328105","doi-asserted-by":"publisher","DOI":"10.1177\/036354659202000313"},{"key":"bibr9-0363546508328105","doi-asserted-by":"publisher","DOI":"10.1177\/036354658701500611"},{"issue":"3","key":"bibr10-0363546508328105","first-page":"426","volume":"18","author":"Hill JL","year":"2004","journal-title":"J Strength Cond Res"},{"key":"bibr11-0363546508328105","doi-asserted-by":"publisher","DOI":"10.1177\/036354658401200310"},{"key":"bibr12-0363546508328105","doi-asserted-by":"publisher","DOI":"10.1177\/036354658301100102"},{"key":"bibr13-0363546508328105","doi-asserted-by":"publisher","DOI":"10.1177\/036354659202000110"},{"key":"bibr14-0363546508328105","doi-asserted-by":"publisher","DOI":"10.1177\/036354659702500317"},{"key":"bibr15-0363546508328105","doi-asserted-by":"publisher","DOI":"10.1177\/03635465000280022301"},{"key":"bibr16-0363546508328105","doi-asserted-by":"publisher","DOI":"10.2519\/jospt.1993.17.6.274"},{"key":"bibr17-0363546508328105","doi-asserted-by":"publisher","DOI":"10.1177\/0363546504269253"},{"key":"bibr18-0363546508328105","doi-asserted-by":"publisher","DOI":"10.1177\/0363546505281796"}],"container-title":["The American Journal of Sports Medicine"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/journals.sagepub.com\/doi\/pdf\/10.1177\/0363546508328105","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/journals.sagepub.com\/doi\/full-xml\/10.1177\/0363546508328105","content-type":"application\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/journals.sagepub.com\/doi\/pdf\/10.1177\/0363546508328105","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,4,28]],"date-time":"2026-04-28T09:40:05Z","timestamp":1777369205000},"score":1,"resource":{"primary":{"URL":"https:\/\/journals.sagepub.com\/doi\/10.1177\/0363546508328105"}},"subtitle":["Injury Implications and Comparison with Overhand Throwing"],"short-title":[],"issued":{"date-parts":[[2009,1,27]]},"references-count":18,"journal-issue":{"issue":"3","published-print":{"date-parts":[[2009,3]]}},"alternative-id":["10.1177\/0363546508328105"],"URL":"https:\/\/doi.org\/10.1177\/0363546508328105","relation":{},"ISSN":["0363-5465","1552-3365"],"issn-type":[{"value":"0363-5465","type":"print"},{"value":"1552-3365","type":"electronic"}],"subject":[],"published":{"date-parts":[[2009,1,27]]}}}