{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,8]],"date-time":"2026-01-08T17:11:37Z","timestamp":1767892297334,"version":"3.49.0"},"reference-count":40,"publisher":"Human Kinetics","issue":"8","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2024,8,1]]},"abstract":"<jats:p><jats:italic><jats:bold>Purpose<\/jats:bold>:<\/jats:italic> In this study, we compared the influence of movement specificity during velocity\u2013load jump testing to predict on-ice acceleration performance in elite speed skaters. <jats:italic><jats:bold>Methods<\/jats:bold>:<\/jats:italic> Elite long-track speed skaters (N\u2009=\u200927) performed velocity\u2013load testing with 3 external loads during unilateral horizontal jumping, lateral jumping, and bilateral vertical countermovement jumping. For the unilateral tests, external load conditions were set to 10\u00a0N, 7.5% and 15% of external load relative to body weight. For the countermovement jumping, load conditions were body weight and 30% and 60% of external load relative to body weight. On-ice performance measures were obtained during maximal 50-m accelerations from a standing start, including maximal skating speed, maximal acceleration capacity, and maximum horizontal power. The 100-m split time from a 500-m race was also obtained. Regularized regression models were used to identify the most important predictors of on-ice acceleration performance. In addition to regularized regression coefficients, Pearson correlation coefficients (<jats:italic>r<\/jats:italic>) were calculated for all variables retained by the model to assess interrelationships between single predictors and on-ice performance measures. <jats:italic><jats:bold>Results<\/jats:bold>:<\/jats:italic> The countermovement jump with 30% of body mass demonstrated the strongest association with maximal skating speed, maximum horizontal power, and 100-m time (regularized regression coefficient\u2009=\u2009.16\u2212.49, <jats:italic>r<\/jats:italic>\u2009=\u2009.84\u2212.97, <jats:italic>P<\/jats:italic>\u2009&lt;\u2009.001). Horizontal jump with 15% of body mass was the strongest predictor of maximal acceleration capacity performance (regularized regression coefficient\u2009=\u2009.08, <jats:italic>r<\/jats:italic>\u2009=\u2009.83, <jats:italic>P<\/jats:italic>\u2009&lt;\u2009.001). <jats:italic><jats:bold>Conclusions<\/jats:bold>:<\/jats:italic> The findings of this study suggest that mechanical specificity rather than movement specificity was more relevant for predicting on-ice acceleration performance.<\/jats:p>","DOI":"10.1123\/ijspp.2023-0373","type":"journal-article","created":{"date-parts":[[2024,6,1]],"date-time":"2024-06-01T10:49:48Z","timestamp":1717238988000},"page":"757-764","source":"Crossref","is-referenced-by-count":4,"title":["Velocity\u2013Load Jump Testing Predicts Acceleration Performance in Elite Speed Skaters: But Does Movement Specificity Matter?"],"prefix":"10.1123","volume":"19","author":[{"ORCID":"https:\/\/orcid.org\/0009-0006-1815-6304","authenticated-orcid":true,"given":"Matthew","family":"Zukowski","sequence":"first","affiliation":[{"name":"Canadian Sport Institute Alberta, Calgary, AB, Canada"},{"name":"Human Performance Lab, Faculty of Kinesiology, University of Calgary, Calgary, AB, Canada"},{"name":"Integrative Neuromuscular Sport Performance Lab, Faculty of Kinesiology, University of Calgary, Calgary, AB, Canada"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5341-0033","authenticated-orcid":true,"given":"Walter","family":"Herzog","sequence":"additional","affiliation":[{"name":"Integrative Neuromuscular Sport Performance Lab, Faculty of Kinesiology, University of Calgary, Calgary, AB, Canada"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8044-1441","authenticated-orcid":true,"given":"Matthew J.","family":"Jordan","sequence":"additional","affiliation":[{"name":"Human Performance Lab, Faculty of Kinesiology, University of Calgary, Calgary, AB, Canada"},{"name":"Integrative Neuromuscular Sport Performance Lab, Faculty of Kinesiology, University of Calgary, Calgary, AB, Canada"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"100","reference":[{"issue":"12","key":"r1","series-title":"Med Sci Sports Exerc","doi-asserted-by":"publisher","first-page":"1703","DOI":"10.1249\/00005768-199512000-00019","article-title":"The start in speed skating: from running to gliding","volume":"27","author":"de Koning J","year":"1995","unstructured":"de Koning J, Thomas R, Berger M, de Groot G, van Ingen Schenau GJ. 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