{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,30]],"date-time":"2026-10-30T11:58:14Z","timestamp":1793361494600,"version":"4.5.0"},"reference-count":64,"publisher":"Human Kinetics","issue":"3","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2026,3,1]]},"abstract":"\n \n Purpose:<\/jats:bold>\n <\/jats:italic>\n This study evaluated how lower-limb explosive strength relates to 15-m speed-climbing performance by combining jump kinetics, muscle morphology, and surface electromyography (sEMG).\n \n Methods:<\/jats:bold>\n <\/jats:italic>\n Fifteen Chinese speed climbers (10 men, 5 women) who had placed within the top 3\u20136 at national-level competitions underwent ultrasound imaging of the rectus femoris (RF) and medial gastrocnemius (GM), and then, in random order, completed unilateral and bilateral squat jumps, countermovement jumps, and a 15-m speed-climbing test. Force plate recorded peak force (\n F<\/jats:italic>\n peak<\/jats:sub>\n ) and rate of force development (RFD); sEMG yielded integrated EMG for the main lower-limb muscles.\n \n Results:<\/jats:bold>\n <\/jats:italic>\n Unilateral and bilateral squat jumps\/countermovement jumps\n F<\/jats:italic>\n peak<\/jats:sub>\n correlated with climbing speed (\n r<\/jats:italic>\n \u2009=\u2009.63\u2013.77,\n P<\/jats:italic>\n \u2009=\u2009.004\u2013.029). Both right-leg (\n r<\/jats:italic>\n \u2009=\u2009.62,\n P<\/jats:italic>\n \u2009=\u2009.033) and bilateral (\n r<\/jats:italic>\n \u2009=\u2009.62,\n P<\/jats:italic>\n \u2009=\u2009.03) countermovement jumps RFD correlated with speed. Bilateral-jump\n F<\/jats:italic>\n peak<\/jats:sub>\n correlated with right-side RF thickness (\n r<\/jats:italic>\n \u2009=\u2009.59\u2013.81,\n P<\/jats:italic>\n \u2009=\u2009.001\u2013.043), whereas bilateral RFD with both GM thickness and fascicle length (\n r<\/jats:italic>\n \u2009=\u2009.58\u2013.63,\n P<\/jats:italic>\n \u2009=\u2009.029\u2013.049). During climbing, speed negatively correlated with left-side RF integrated EMG (\n r<\/jats:italic>\n \u2009=\u2009\u2013.6,\n P<\/jats:italic>\n \u2009=\u2009.041) and positively with bilateral GM integrated EMG (\n r<\/jats:italic>\n \u2009=\u2009.59\u2013.64,\n P<\/jats:italic>\n \u2009=\u2009.026\u2013.045; other muscles\n P<\/jats:italic>\n \u2009>\u2009.05).\n \n Conclusions:<\/jats:bold>\n <\/jats:italic>\n Right-leg RF thickness appears to drive\n F<\/jats:italic>\n peak<\/jats:sub>\n , and thus climbing speed, whereas GM thickness and fascicle length primarily influence RFD. A contrasting activation pattern (lower RF, higher GM engagement) likely underlies these morphology\u2013performance links. Coaches can target maximal-strength and plyometric training to enlarge the right RF and GM and lengthen GM fascicles, potentially improving speed-climbing performance.\n <\/jats:p>","DOI":"10.1123\/ijspp.2025-0329","type":"journal-article","created":{"date-parts":[[2026,2,10]],"date-time":"2026-02-10T02:25:53Z","timestamp":1770690353000},"page":"456-462","source":"Crossref","is-referenced-by-count":7,"title":["The Relationship Between Lower-Limb Explosive Strength and Climbing Speed in Elite Speed Climbers: A Comprehensive Analysis Based on Muscle Morphology and Electromyography"],"prefix":"10.1123","volume":"21","author":[{"ORCID":"https:\/\/orcid.org\/0009-0002-3553-6932","authenticated-orcid":true,"given":"Ming","family":"Li","sequence":"first","affiliation":[{"name":"Chengdu Sport University, Chengdu, SC, China"},{"name":"College of Education and Sports Sciences, Yangtze University, Jingzhou, HUB, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yongkang","family":"Zhu","sequence":"additional","affiliation":[{"name":"College of Education and Sports Sciences, Yangtze University, Jingzhou, HUB, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0000-2420-978X","authenticated-orcid":true,"given":"Yi","family":"Peng","sequence":"additional","affiliation":[{"name":"School of Physical Education, Putian University, Putian, FJ, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"100","reference":[{"issue":"3","key":"r1","series-title":"Eur J Appl Physiol","doi-asserted-by":"publisher","first-page":"791","DOI":"10.1007\/s00421-018-04070-w","article-title":"Changes in blood lactate and muscle activation in elite rock climbers during a 15-m speed climb","volume":"119","author":"Guo F","year":"2019","unstructured":"Guo F, Wang Q, Liu Y, Hanson NJ. 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