{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,26]],"date-time":"2026-09-26T22:50:17Z","timestamp":1790463017472,"version":"4.1.0"},"reference-count":36,"publisher":"SAGE Publications","issue":"3","license":[{"start":{"date-parts":[[2014,1,24]],"date-time":"2014-01-24T00:00:00Z","timestamp":1390521600000},"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":[[2014,3]]},"abstract":"<jats:sec>\n                    <jats:title>Background:<\/jats:title>\n                    <jats:p>Impaired hip muscle performance has been implicated as a contributing factor to the increased risk of anterior cruciate ligament (ACL) injury in women.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Purpose:<\/jats:title>\n                    <jats:p>To determine the influence of a hip-focused training program on lower extremity biomechanics during a drop-jump task.<\/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>Twenty-one recreationally active women (18-25 years of age) participated in a 4-week training program consisting of hip-focused plyometric and balance perturbation exercises (3 times\/wk, 30 min\/session). Maximum isometric strength of the hip extensors, hip abductors, and knee extensors was assessed, along with lower extremity biomechanics during a drop-jump task. All assessments were performed within 5 days of initiation and completion of the training program.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results:<\/jats:title>\n                    <jats:p>After training, subjects demonstrated significantly greater maximum isometric strength of the hip extensors (2.87 \u00b1 0.7 vs 3.11 \u00b1 0.7 N\u00b7m\/kg; P &lt; .01) and hip abductors (2.08 \u00b1 0.7 vs 2.23 \u00b1 0.07 N\u00b7m\/kg; P = .004). No significant difference in knee extensor strength was observed. After training, subjects landed with significantly greater peak knee flexion (94.0\u00b0 \u00b1 8.5\u00b0 vs 98.0\u00b0 \u00b1 10.1\u00b0; P &lt; .001) and hip flexion (83.4\u00b0 \u00b1 7.6\u00b0 vs 89.9\u00b0 \u00b1 8.8\u00b0; P = .008) and a lower knee\/hip extensor moment ratio (1.33 \u00b1 0.6 vs 0.99 \u00b1 0.3; P = .001). In addition, subjects demonstrated significantly lower peak knee abduction angles (6.8\u00b0 \u00b1 3.3\u00b0 vs 5.6\u00b0 \u00b1 3.1\u00b0; P = .04) and average knee adductor moments (0.06 \u00b1 0.1 vs \u22120.02 \u00b1 0.1 N\u00b7m\/kg; P &lt; .001).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion:<\/jats:title>\n                    <jats:p>Changes in lower extremity biomechanics consistent with decreased risk for ACL injury were observed after participation in a hip-focused training program.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Clinical Relevance:<\/jats:title>\n                    <jats:p>The study results suggest that ACL injury prevention programs targeting hip muscle performance may be important in mitigating biomechanical risk factors associated with ACL injury in women.<\/jats:p>\n                  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