{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,3]],"date-time":"2026-10-03T16:37:08Z","timestamp":1791045428405,"version":"4.1.0"},"reference-count":27,"publisher":"SAGE Publications","issue":"1_suppl","license":[{"start":{"date-parts":[[2011,7,1]],"date-time":"2011-07-01T00:00:00Z","timestamp":1309478400000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["Am J Sports Med"],"published-print":{"date-parts":[[2011,7]]},"abstract":"<jats:sec>\n                    <jats:title>Background<\/jats:title>\n                    <jats:p>Femoroacetabular impingement (FAI) is becoming a prevalent overuse injury diagnosis among hockey players. In the adult ice hockey stride, the \u201cat-risk\u201d hip position, defined by internal rotation during flexion and external rotation during abduction, reportedly increases hip vulnerability to labral injury as a result of FAI.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Hypothesis<\/jats:title>\n                    <jats:p>Peewee youth ice hockey players display the kinematics for both described at-risk hip positions (internal rotation during flexion and external rotation during abduction) in the ice hockey sprint start.<\/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>Twelve healthy male Peewee ice hockey players (mean age, 10.8 \u00b1 0.6 years) participated in this study. Thirty-five anatomic landmarks were used to analyze the 3-dimensional kinematic and kinetic variables of the hip associated with the ice hockey sprint start. Ten high-speed (120-Hz) infrared cameras recorded the trials, which were subsequently analyzed with Motion Monitor software. The sprint start was recorded over 4 defined periods of motion: start, push, swing, and even.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>In the \u201cpush\u201d period, 11.5\u00b0 of external rotation was observed concurrently with 13.2\u00b0 of abduction in the push leg, and 6.8\u00b0 of internal rotation occurred with 33.8\u00b0 of flexion in the lead leg. During the recovery phase of the \u201cswing\u201d period, maximum internal rotation was 5.6\u00b0 with concurrent hip flexion of 44.2\u00b0 in the push leg, while lead leg internal rotation reached a maximum of 10.8\u00b0 with hip flexion of 35.1\u00b0 during the \u201ceven\u201d period.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>During the sprint start, youth ice hockey players externally rotate in abduction during the push-off phase and internally rotate through increasing hip flexion during the recovery phase, displaying the at-risk hip positions of the ice hockey skating stride.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Clinical Relevance<\/jats:title>\n                    <jats:p>During the sprint start, youth ice hockey players position their hips in a manner that can cause impingement of the femoral neck against the acetabulum and potentially lead to labral tears and\/or articular cartilage damage. This knowledge could be applied to assist in the prevention of overuse injuries of the hip as youth hockey players mature and increase in skill level.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1177\/0363546511414012","type":"journal-article","created":{"date-parts":[[2011,6,28]],"date-time":"2011-06-28T03:38:30Z","timestamp":1309232310000},"page":"29-35","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":92,"title":["\u201cAt-Risk\u201d Positioning and Hip Biomechanics of the Peewee Ice Hockey Sprint Start"],"prefix":"10.1177","volume":"39","author":[{"given":"Justin D.","family":"Stull","sequence":"first","affiliation":[{"name":"Steadman Philippon Research Institute, Vail, Colorado"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Marc J.","family":"Philippon","sequence":"additional","affiliation":[{"name":"Steadman Philippon Research Institute, Vail, Colorado"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Robert F.","family":"LaPrade","sequence":"additional","affiliation":[{"name":"Steadman Philippon Research Institute, Vail, Colorado"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"179","published-online":{"date-parts":[[2017,8,29]]},"reference":[{"issue":"2","key":"bibr1-0363546511414012","first-page":"241","volume":"42","author":"Agel J","year":"2007","journal-title":"J Athl Train"},{"key":"bibr2-0363546511414012","doi-asserted-by":"publisher","DOI":"10.1177\/0363546507304141"},{"key":"bibr3-0363546511414012","doi-asserted-by":"publisher","DOI":"10.1542\/peds.2007-0887"},{"key":"bibr4-0363546511414012","doi-asserted-by":"publisher","DOI":"10.1097\/JSM.0b013e318172831a"},{"key":"bibr5-0363546511414012","doi-asserted-by":"publisher","DOI":"10.1080\/14763140903229534"},{"key":"bibr6-0363546511414012","doi-asserted-by":"publisher","DOI":"10.1097\/00042752-199907000-00006"},{"key":"bibr7-0363546511414012","doi-asserted-by":"publisher","DOI":"10.1097\/01.blo.0000096804.78689.c2"},{"key":"bibr8-0363546511414012","volume-title":"Exercise and Sport Science","author":"Garrett WE","year":"2000"},{"key":"bibr9-0363546511414012","unstructured":"Hockey Canada Player Registration. 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