{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,22]],"date-time":"2026-05-22T07:06:16Z","timestamp":1779433576381,"version":"3.53.1"},"reference-count":47,"publisher":"Wiley","issue":"7","license":[{"start":{"date-parts":[[2026,3,31]],"date-time":"2026-03-31T00:00:00Z","timestamp":1774915200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2026,3,31]],"date-time":"2026-03-31T00:00:00Z","timestamp":1774915200000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"content-domain":{"domain":["physoc.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Physiological Reports"],"published-print":{"date-parts":[[2026,4]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>The purposes of this study were to compare mechanical properties of tendon structures during single and repetitive contractions between long\u2010distance runners (LDR) and untrained males (UTM) and to verify the relationship between changes in mechanical properties of tendon structures during repetitive contractions and running performance in LDR. Mechanical properties of tendon structures of vastus lateralis (VL) and medial gastrocnemius (MG) muscles were measured during single contraction. In addition, changes in mechanical properties of VL and MG tendon structures were measured during 20\u2009min of repetitive contractions. During single contraction, maximal elongation of tendon structures was significantly lower in LDR than in UTM for VL, but not MG. During repetitive contractions, hysteresis of VL and MG tendon structures increased significantly for both groups. In LDR, the relative change in hysteresis of MG tendon structures, but not VL, during repetitive contractions was significantly correlated with the best official record in the 5000\u2010m race. In conclusion, LDR exhibited lower extensibility of tendon structures for VL compared to UTM, while both LDR and UTM showed significant increases in hysteresis of VL and MG tendon structures during repetitive contractions. Furthermore, LDR with higher competitive performance showed a lower increase in hysteresis of tendon structures for MG during repetitive contractions.<\/jats:p>","DOI":"10.14814\/phy2.70859","type":"journal-article","created":{"date-parts":[[2026,4,1]],"date-time":"2026-04-01T04:23:40Z","timestamp":1775017420000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Changes in the mechanical properties of tendon structures in lower limbs during repetitive contractions in male long\u2010distance runners"],"prefix":"10.14814","volume":"14","author":[{"given":"Shuhei","family":"Sasajima","sequence":"first","affiliation":[{"name":"Department of Life Science The University of Tokyo  Meguro Tokyo Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Daisuke","family":"Miyazaki","sequence":"additional","affiliation":[{"name":"Department of Physical Education Kokushikan University  Setagaya\u2010ku Tokyo Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shigeharu","family":"Tanaka","sequence":"additional","affiliation":[{"name":"Department of Physical Education Kokushikan University  Setagaya\u2010ku Tokyo Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4938-1313","authenticated-orcid":false,"given":"Keitaro","family":"Kubo","sequence":"additional","affiliation":[{"name":"Department of Life Science The University of Tokyo  Meguro Tokyo Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2026,3,31]]},"reference":[{"key":"e_1_2_11_2_1","doi-asserted-by":"publisher","DOI":"10.1007\/s00421-016-3482-z"},{"key":"e_1_2_11_3_1","doi-asserted-by":"publisher","DOI":"10.1007\/s00421-012-2585-4"},{"key":"e_1_2_11_4_1","doi-asserted-by":"publisher","DOI":"10.1242\/jeb.02340"},{"key":"e_1_2_11_5_1","doi-asserted-by":"publisher","DOI":"10.1098\/rsos.230007"},{"key":"e_1_2_11_6_1","doi-asserted-by":"publisher","DOI":"10.1098\/rspb.2019.2560"},{"key":"e_1_2_11_7_1","doi-asserted-by":"publisher","DOI":"10.1152\/jappl.2000.89.4.1352"},{"key":"e_1_2_11_8_1","doi-asserted-by":"publisher","DOI":"10.1007\/s00167-006-0143-5"},{"key":"e_1_2_11_9_1","doi-asserted-by":"publisher","DOI":"10.2340\/16501977198618159163"},{"key":"e_1_2_11_10_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jbiomech.2010.12.015"},{"key":"e_1_2_11_11_1","doi-asserted-by":"publisher","DOI":"10.1007\/s00421-011-2019-8"},{"key":"e_1_2_11_12_1","doi-asserted-by":"publisher","DOI":"10.1152\/japplphysiol.00307.2009"},{"key":"e_1_2_11_13_1","doi-asserted-by":"publisher","DOI":"10.1007\/s00421-010-1582-8"},{"key":"e_1_2_11_14_1","doi-asserted-by":"publisher","DOI":"10.1152\/japplphysiol.00732.2014"},{"key":"e_1_2_11_15_1","doi-asserted-by":"publisher","DOI":"10.1371\/journal.pone.0202026"},{"key":"e_1_2_11_16_1","doi-asserted-by":"publisher","DOI":"10.1097\/00003677-200207000-00003"},{"key":"e_1_2_11_17_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jisako.2023.11.001"},{"key":"e_1_2_11_18_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jmbbm.2020.103889"},{"key":"e_1_2_11_19_1","doi-asserted-by":"publisher","DOI":"10.1097\/JES.0b013e3181878417"},{"key":"e_1_2_11_20_1","doi-asserted-by":"publisher","DOI":"10.1152\/japplphysiol.00281.2009"},{"key":"e_1_2_11_21_1","doi-asserted-by":"publisher","DOI":"10.1080\/14763141.2019.1615541"},{"key":"e_1_2_11_22_1","first-page":"864","article-title":"Influences of repetitive drop jump and isometric leg press exercises on tendon properties in knee extensors","volume":"19","author":"Kubo K.","year":"2005","journal-title":"Journal of Strength & Conditioning Research"},{"key":"e_1_2_11_23_1","doi-asserted-by":"publisher","DOI":"10.1007\/s004210050028"},{"key":"e_1_2_11_24_1","doi-asserted-by":"publisher","DOI":"10.1152\/jappl.2001.91.1.277"},{"key":"e_1_2_11_25_1","doi-asserted-by":"publisher","DOI":"10.1007\/s00421-015-3156-2"},{"key":"e_1_2_11_26_1","doi-asserted-by":"publisher","DOI":"10.1007\/s00421-010-1528-1"},{"key":"e_1_2_11_27_1","doi-asserted-by":"publisher","DOI":"10.1242\/jeb.100826"},{"key":"e_1_2_11_28_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jbiomech.2005.10.035"},{"key":"e_1_2_11_29_1","first-page":"4388","article-title":"Effects of running on human Achilles tendon length\u2010tension properties in the free and gastrocnemius components","volume":"216","author":"Lichtwark G. 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