{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,8]],"date-time":"2026-05-08T22:19:12Z","timestamp":1778278752800,"version":"3.51.4"},"reference-count":38,"publisher":"Human Kinetics","issue":"10","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2022,10,1]]},"abstract":"<jats:p><jats:italic><jats:bold>Purpose<\/jats:bold>:<\/jats:italic> We investigated whether 4 weeks of intensified training consisting of speed endurance training (SET) enhanced high-intensity exercise performance in youth national-team ice hockey players. <jats:bold><jats:italic>Methods<\/jats:italic><\/jats:bold>: Utilizing a randomized crossover design, we subjected 17 players to 4 weeks of SET, comprising 6 to 10 \u00d7 20 seconds at maximal effort (&gt;95% maximum ice skating speed) with 120-second recovery performed 3 times weekly, or maintenance of regular training (control period). Before and after each period, players completed ice-hockey-specific tests on ice, including a Yo-Yo Intermittent Recovery Level 1 test, a 30-m sprint test, and an agility test. On a separate day, players were assessed for body composition with dual-energy X-ray absorptiometry and performed countermovement jump, maximal voluntary isometric knee extensor contraction, a 15-second maximal sprint test, and a submaximal and incremental test on a bike ergometer in which pulmonary oxygen consumption was determined. <jats:bold><jats:italic>Results<\/jats:italic><\/jats:bold><jats:bold><jats:italic>:<\/jats:italic><\/jats:bold> Yo-Yo Intermittent Recovery Level 1 test performance increased (<jats:italic>P<\/jats:italic> &lt; .001) by 14% (95% CI, 201\u2013496 m) during the SET period. Maximal pulmonary oxygen consumption (<jats:italic>P<\/jats:italic> &lt; .05) and time to exhaustion (P &lt; .05) were 4.8% and 6.5% higher, respectively, after the SET period than before. Fat-free mass increased (<jats:italic>P<\/jats:italic> &lt; .01) during the SET period by 1.7 kg (95% CI, 1.0\u20132.5), whereas fat mass remained unchanged. These effects were superior to the control period. <jats:bold><jats:italic>Conclusions<\/jats:italic><\/jats:bold><jats:bold><jats:italic>:<\/jats:italic><\/jats:bold> These findings underpin the effectiveness of SET for improving on-ice high-intensity performance and highlight that elite ice hockey players can benefit from implementing SET.<\/jats:p>","DOI":"10.1123\/ijspp.2021-0560","type":"journal-article","created":{"date-parts":[[2022,7,26]],"date-time":"2022-07-26T13:47:38Z","timestamp":1658843258000},"page":"1507-1515","source":"Crossref","is-referenced-by-count":9,"title":["Four Weeks of Intensified Training Enhances On-Ice Intermittent Exercise Performance and Increases Maximal Oxygen Consumption of Youth National-Team Ice Hockey Players"],"prefix":"10.1123","volume":"17","author":[{"given":"Jan","family":"Sommer Jeppesen","sequence":"first","affiliation":[{"name":"The August Krogh Section for Human Physiology, Department of Nutrition, Exercise and Sports (NEXS), University of Copenhagen, Copenhagen, Denmark"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jeppe F.","family":"Vigh-Larsen","sequence":"additional","affiliation":[{"name":"Section of Sport Science, Department of Public Health, Aarhus University, Aarhus, Denmark"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mikkel S.","family":"Oxfeldt","sequence":"additional","affiliation":[{"name":"Section of Sport Science, Department of Public Health, Aarhus University, Aarhus, Denmark"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Niklas M.","family":"Laustsen","sequence":"additional","affiliation":[{"name":"The August Krogh Section for Human Physiology, Department of Nutrition, Exercise and Sports (NEXS), University of Copenhagen, Copenhagen, Denmark"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Magni","family":"Mohr","sequence":"additional","affiliation":[{"name":"Department of Sports Science and Clinical Biomechanics, SDU Sport and Health Sciences Cluster (SHSC), University of Southern Denmark, Odense, Denmark"},{"name":"Centre of Health Sciences, Faculty of Health, University of the Faroe Islands, T\u00f3rshavn, Faroe Islands"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jens","family":"Bangsbo","sequence":"additional","affiliation":[{"name":"The August Krogh Section for Human Physiology, Department of Nutrition, Exercise and Sports (NEXS), University of Copenhagen, Copenhagen, Denmark"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Morten","family":"Hostrup","sequence":"additional","affiliation":[{"name":"The August Krogh Section for Human Physiology, Department of Nutrition, Exercise and Sports (NEXS), University of Copenhagen, Copenhagen, Denmark"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"100","reference":[{"issue":"3","key":"r1","series-title":"Sports Med","doi-asserted-by":"publisher","first-page":"184","DOI":"10.2165\/00007256-199519030-00004","article-title":"Applied physiology of ice hockey","volume":"19","author":"Cox MH","year":"1995","unstructured":"Cox MH, Miles DS, Verde TJ, Rhodes EC. 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