{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,16]],"date-time":"2026-06-16T13:36:13Z","timestamp":1781616973496,"version":"3.54.5"},"reference-count":45,"publisher":"The Company of Biologists","issue":"24","license":[{"start":{"date-parts":[[2021,12,15]],"date-time":"2021-12-15T00:00:00Z","timestamp":1639526400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/www.biologists.com\/user-licence-1-1\/"}],"funder":[{"name":"National Science Foundation","award":["1553550"],"award-info":[{"award-number":["1553550"]}]},{"DOI":"10.13039\/100000183","name":"Army Research Office","doi-asserted-by":"crossref","award":["66554-EG"],"award-info":[{"award-number":["66554-EG"]}],"id":[{"id":"10.13039\/100000183","id-type":"DOI","asserted-by":"crossref"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2021,12,15]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n               <jats:p>The musculotendon work contributions across all joints during jumping by kangaroo rats are not well understood. Namely, measures of external joint work do not provide information on the contributions from individual muscles or in-series elastic structures. In this study, we examined the functional roles of a major ankle extensor muscle, the lateral gastrocnemius (LG), and a major knee extensor muscle, the vastus lateralis (VL), through in vivo sonomicrometry and electromyography techniques, during vertical jumping by kangaroo rats. Our data showed that both muscles increased shortening and activity with higher jumps. We found that knee angular velocity and VL muscle shortening velocity were coupled in time. In contrast, the ankle angular velocity and LG muscle shortening velocity were decoupled, and rapid joint extension near the end of the jump produced high power outputs at the ankle joint. Further, the decoupling of muscle and joint kinematics allowed the LG muscle to prolong the period of shortening velocity near optimal velocity, which likely enabled the muscle to sustain maximal power generation. These observations were consistent with an LG tendon that is much more compliant than that of the VL.<\/jats:p>","DOI":"10.1242\/jeb.242630","type":"journal-article","created":{"date-parts":[[2021,12,6]],"date-time":"2021-12-06T15:26:13Z","timestamp":1638804373000},"source":"Crossref","is-referenced-by-count":8,"title":["Plantar flexor muscles of kangaroo rats (<i>Dipodomys deserti<\/i>) shorten at a velocity to produce optimal power during jumping"],"prefix":"10.1242","volume":"224","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-1666-3111","authenticated-orcid":false,"given":"M. Janneke","family":"Schwaner","sequence":"first","affiliation":[{"name":"Department of Biological Sciences, University of Idaho, Moscow, ID 83844, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"David C.","family":"Lin","sequence":"additional","affiliation":[{"name":"Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, WA 99164, USA"},{"name":"Department of Integrative Physiology and Neuroscience, Washington State University, Pullman, WA 99164, USA"},{"name":"Washington Center for Muscle Biology, Washington State University, Pullman, WA 99164, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Craig P.","family":"McGowan","sequence":"additional","affiliation":[{"name":"Department of Biological Sciences, University of Idaho, Moscow, ID 83844, USA"},{"name":"Washington Center for Muscle Biology, Washington State University, Pullman, WA 99164, USA"},{"name":"WWAMI Medical Education Program, Moscow, ID 83844, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"237","published-online":{"date-parts":[[2021,12,22]]},"reference":[{"key":"2021122213324364500_JEB242630C1","doi-asserted-by":"publisher","first-page":"1607","DOI":"10.1098\/rstb.1998.0313","article-title":"Vertical jumping in Galago senegalensis: the quest for an obligate mechanical power amplifier","volume":"353","author":"Aerts","year":"1998","journal-title":"Philos. 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