{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,30]],"date-time":"2026-09-30T16:56:45Z","timestamp":1790787405488,"version":"4.1.0"},"reference-count":39,"publisher":"Wiley","issue":"9","license":[{"start":{"date-parts":[[2024,6,21]],"date-time":"2024-06-21T00:00:00Z","timestamp":1718928000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["European Journal of Sport Science"],"published-print":{"date-parts":[[2024,9]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Numerous cross\u2010sectional studies have attempted to identify the muscle morphology required to achieve high sprint velocity. Our longitudinal study addressed an unanswered question of cross\u2010sectional studies: whether hypertrophy of the individual trunk and thigh muscles induced by daily training (e.g., sprint, jump, and resistance training) is linked to an improvement in sprint performance within well\u2010trained sprinters. Twenty\u2010three collegiate male sprinters (100\u2010m best time of 11.36\u00a0\u00b1\u00a00.44\u00a0s) completed their daily training for 1\u00a0year without our intervention. Before and after the observation period, the sprint velocities at 0\u2013100\u00a0m, 0\u201310\u00a0m, and 50\u201360\u00a0m intervals were measured using timing gates. The volumes of 14 trunk and thigh muscles were measured using magnetic resonance imaging. Muscle volumes were normalized to the participants' body mass at each time point. Sprint velocities increased at the 0\u2013100\u00a0m (<jats:italic>p<\/jats:italic>\u00a0&lt;\u00a00.001), 0\u201310\u00a0m (<jats:italic>p<\/jats:italic>\u00a0=\u00a00.019), and 50\u201360\u00a0m (<jats:italic>p<\/jats:italic>\u00a0=\u00a00.018) intervals after the observation period. The relative volumes of the tensor fasciae latae, sartorius, biceps femoris long head, biceps femoris short head, semitendinosus, and iliacus were increased (all <jats:italic>p<\/jats:italic>\u00a0&lt;\u00a00.050). Among the hypertrophied muscles, only the change in the relative volume of the semitendinosus was positively correlated with the change in sprint velocity at the 50\u201360\u00a0m interval (<jats:italic>p<\/jats:italic>\u00a0=\u00a00.018 and <jats:italic>\u03c1<\/jats:italic>\u00a0=\u00a00.591). These findings suggest that semitendinosus hypertrophy seems to be associated with sprint performance improvement within well\u2010trained sprinters during the maximal velocity phase.<\/jats:p>","DOI":"10.1002\/ejsc.12155","type":"journal-article","created":{"date-parts":[[2024,6,22]],"date-time":"2024-06-22T03:15:40Z","timestamp":1719026140000},"page":"1228-1239","source":"Crossref","is-referenced-by-count":12,"title":["Muscle morphological changes and enhanced sprint running performance: A 1\u2010year observational study of well\u2010trained sprinters"],"prefix":"10.1002","volume":"24","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-9311-1268","authenticated-orcid":false,"given":"Raki","family":"Kawama","sequence":"first","affiliation":[{"name":"Faculty of Health and Sports Science Doshisha University  Kyotanabe\u2010shi Kyoto Japan"},{"name":"Organization for Research Initiatives and Development  Tokyo Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8534-0888","authenticated-orcid":false,"given":"Katsuki","family":"Takahashi","sequence":"additional","affiliation":[{"name":"Faculty of Health and Sports Science Doshisha University  Kyotanabe\u2010shi Kyoto Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0003-7819-8547","authenticated-orcid":false,"given":"Hironoshin","family":"Tozawa","sequence":"additional","affiliation":[{"name":"Graduate School of Health and Sports Science Doshisha University  Kyotanabe\u2010shi Kyoto Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0009-0047-5042","authenticated-orcid":false,"given":"Takafumi","family":"Obata","sequence":"additional","affiliation":[{"name":"Graduate School of Health and Sports Science Doshisha University  Kyotanabe\u2010shi Kyoto Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0007-8978-0689","authenticated-orcid":false,"given":"Norifumi","family":"Fujii","sequence":"additional","affiliation":[{"name":"Faculty of Health and Sports Science Doshisha University  Kyotanabe\u2010shi Kyoto Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5189-0662","authenticated-orcid":false,"given":"Aya","family":"Arai","sequence":"additional","affiliation":[{"name":"Faculty of Health and Sports Science Doshisha University  Kyotanabe\u2010shi Kyoto Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7582-6753","authenticated-orcid":false,"given":"Tatsuya","family":"Hojo","sequence":"additional","affiliation":[{"name":"Faculty of Health and Sports Science Doshisha University  Kyotanabe\u2010shi Kyoto Japan"},{"name":"Graduate School of Health and Sports Science Doshisha University  Kyotanabe\u2010shi Kyoto Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6864-7706","authenticated-orcid":false,"given":"Taku","family":"Wakahara","sequence":"additional","affiliation":[{"name":"Faculty of Health and Sports Science Doshisha University  Kyotanabe\u2010shi Kyoto Japan"},{"name":"Human Performance Laboratory Waseda University  Saitama Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2024,6,21]]},"reference":[{"issue":"1","key":"e_1_2_10_2_1","first-page":"47","article-title":"The Men\u2019s 100 Metres","volume":"7","author":"Ae M.","year":"1992","journal-title":"New Studies in Athletics"},{"key":"e_1_2_10_3_1","first-page":"64","volume-title":"Architectural, Histochemical, and Contractile Characteristics of a Unique Biarticular Muscle: The Cat Semitendinosus","author":"Bodine S. 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