{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,24]],"date-time":"2026-10-24T00:01:57Z","timestamp":1792800117043,"version":"4.5.0"},"reference-count":36,"publisher":"Wiley","issue":"2","license":[{"start":{"date-parts":[[2015,2,18]],"date-time":"2015-02-18T00:00:00Z","timestamp":1424217600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"DOI":"10.13039\/501100003965","name":"International Olympic Committee","doi-asserted-by":"publisher","id":[{"id":"10.13039\/501100003965","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Scandinavian Med Sci Sports"],"published-print":{"date-parts":[[2016,2]]},"abstract":"\n Patellar tendinopathy (jumper's knee) has a high prevalence in jumping athletes. Excessive load on the patellar tendon through high volumes of training and competition is an important risk factor. Structural changes in the tendon are related to a higher risk of developing patellar tendinopathy. The critical tendon load that affects tendon structure is unknown. The aim of this study was to investigate patellar tendon structure on each day of a 5\u2010day volleyball tournament in an adolescent population (16\u201318 years). The right patellar tendon of 41 players in the\n A<\/jats:styled-content>\n ustralian\n V<\/jats:styled-content>\n olleyball\n S<\/jats:styled-content>\n chools\n C<\/jats:styled-content>\n up was scanned with ultrasound tissue characterization (\n UTC<\/jats:styled-content>\n ) on every day of the tournament (\n M<\/jats:styled-content>\n onday to\n F<\/jats:styled-content>\n riday).\n UTC<\/jats:styled-content>\n can quantify structure of a tendon into four echo types based on the stability of the echo pattern. Generalized estimating equations (\n GEE<\/jats:styled-content>\n ) were used to test for change of echo type\n I<\/jats:styled-content>\n and\n II<\/jats:styled-content>\n over the tournament days. Participants played between eight and nine matches during the tournament.\n GEE<\/jats:styled-content>\n analysis showed no significant change of echo type percentages of echo type\n I<\/jats:styled-content>\n (\n W<\/jats:styled-content>\n ald chi\u2010square\u2009=\u20094.603, d.f.\u2009=\u20094,\n P<\/jats:italic>\n \u2009=\u20090.331) and echo type\n II<\/jats:styled-content>\n (\n W<\/jats:styled-content>\n ald chi\u2010square\u2009=\u20096.070, d.f.\u2009=\u20094,\n P<\/jats:italic>\n \u2009=\u20090.194) over time. This study shows that patellar tendon structure of 16\u201318\u2010year\u2010old volleyball players is not affected during 5 days of cumulative loading during a volleyball tournament.\n <\/jats:p>","DOI":"10.1111\/sms.12426","type":"journal-article","created":{"date-parts":[[2015,2,18]],"date-time":"2015-02-18T22:52:47Z","timestamp":1424299967000},"page":"189-196","source":"Crossref","is-referenced-by-count":33,"title":["Does the adolescent patellar tendon respond to 5 days of cumulative load during a volleyball tournament?"],"prefix":"10.1111","volume":"26","author":[{"given":"M.","family":"van Ark","sequence":"first","affiliation":[{"name":"Center for Sports Medicine University Medical Center Groningen University of Groningen Groningen The Netherlands"},{"name":"Department of Physiotherapy Monash University Frankston Victoria Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"S.I.","family":"Docking","sequence":"additional","affiliation":[{"name":"Department 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