{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,29]],"date-time":"2026-09-29T14:52:45Z","timestamp":1790693565460,"version":"4.1.0"},"reference-count":26,"publisher":"BMJ","issue":"7","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Br J Sports Med"],"published-print":{"date-parts":[[2007,7]]},"abstract":"<jats:p>\n                    <jats:bold>Objective:<\/jats:bold>\n                    The aetiology of patellar tendinopathy (jumper\u2019s knee) remains unclear. To see whether landing strategy might be a risk factor for the development of this injury, this study examined whether landing dynamics from drop jumps differed among healthy volleyball players (CON) and volleyball players with a jumper\u2019s knee. The patients with jumper\u2019s knee were divided into an asymptomatic group with a previous jumper\u2019s knee (PJK) and a symptomatic group with a recent jumper\u2019s knee (RJK).\n                  <\/jats:p>\n                  <jats:p>\n                    <jats:bold>Methods:<\/jats:bold>\n                    Inverse dynamics analyses were used to estimate lower extremity joint dynamics from 30, 50 and 70 cm drop jumps in the three groups (CON, n\u200a=\u200a8; PJK, n\u200a=\u200a7; RJK, n\u200a=\u200a9). A univariate repeated measures analysis of variance was used to compare the different landing techniques.\n                  <\/jats:p>\n                  <jats:p>\n                    <jats:bold>Results:<\/jats:bold>\n                    Data analysis of the landing dynamics revealed that PJK showed higher knee angular velocities (p&lt;0.01), and higher ankle plantar flexion moment loading rate (p&lt;0.01). Furthermore, strong tendencies of higher loading rate of vertical ground reaction force (p\u200a=\u200a0.05) and higher knee extensor moment loading rate (p\u200a=\u200a0.08) were found compared with CON. Higher values for peak knee moment, peak knee power and knee work (all p&lt;0.01) were found for CON compared with RJK. The comparison of the two jumper\u2019s knee groups yielded higher knee angular velocities (p&lt;0.01), together with higher ankle plantar flexion and knee extensor moment loading rate (p&lt;0.01 and p&lt;0.05, respectively).\n                  <\/jats:p>\n                  <jats:p>\n                    <jats:bold>Conclusion:<\/jats:bold>\n                    Where RJK used a landing technique to avoid high patellar tendon loading, PJK used a stiffer landing strategy, which may be a risk factor in the development of patellar tendinopathy.\n                  <\/jats:p>","DOI":"10.1136\/bjsm.2006.032565","type":"journal-article","created":{"date-parts":[[2007,1,16]],"date-time":"2007-01-16T10:31:52Z","timestamp":1168943512000},"page":"e8-e8","source":"Crossref","is-referenced-by-count":105,"title":["Relationship between landing strategy and patellar tendinopathy in volleyball"],"prefix":"10.1136","volume":"41","author":[{"given":"Rob 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