{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,28]],"date-time":"2026-07-28T07:23:37Z","timestamp":1785223417839,"version":"3.55.0"},"reference-count":36,"publisher":"Human Kinetics","issue":"9","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2022,9,1]]},"abstract":"<jats:p><jats:italic><jats:bold>Purpose<\/jats:bold>:<\/jats:italic> To examine the effect of fast- versus slow-speed eccentric-muscle-action resistance training on lower-body strength, vertical jump height, sprint speed, and change-of-direction performance in elite soccer players during a competitive season. <jats:italic><jats:bold>Methods<\/jats:bold>:<\/jats:italic> Twenty-two elite soccer players, from a single team, were randomly assigned to groups that undertook either 1- (fast speed) or 4-second (slow speed) eccentric resistance training during the in-season period. A 5-week program was conducted during an elite top-division European League soccer season. Performance measures including predicted 1-repetition-maximum back squat, countermovement jump, 20-m sprint, and change of direction were tested before and after the intervention period. Total match and training running distance and muscle soreness were also recorded during each week of the intervention. <jats:italic><jats:bold>Results<\/jats:bold>:<\/jats:italic> An analysis of covariance showed significant group effects (<jats:italic>P<\/jats:italic>\u2009=\u2009.01) for countermovement jump with a greater jump height in the 1-second fast-speed group postintervention (95% CI, 1.1\u20136.9\u00a0cm). Despite an overall increase in 1-repetition maximum pretraining to posttraining (95% CI, 10.0\u201315.3\u00a0kg, effect size 0.69), there were no significant differences (<jats:italic>P<\/jats:italic>\u2009&gt;\u2009.05) between groups after the intervention. Similarly, there were no differences between groups for change of direction, 20-m sprint, or muscle soreness. <jats:italic><jats:bold>Conclusion<\/jats:bold>:<\/jats:italic> Faster eccentric muscle actions may be superior for increasing movements in elite soccer players in-season.<\/jats:p>","DOI":"10.1123\/ijspp.2021-0542","type":"journal-article","created":{"date-parts":[[2022,7,7]],"date-time":"2022-07-07T04:14:07Z","timestamp":1657167247000},"page":"1425-1431","source":"Crossref","is-referenced-by-count":9,"title":["Slow-Speed Compared With Fast-Speed Eccentric Muscle Actions Are Detrimental to Jump Performance in Elite Soccer Players In-Season"],"prefix":"10.1123","volume":"17","author":[{"given":"Nick","family":"Segers","sequence":"first","affiliation":[{"name":"Faculty of Sport, Health and Applied Science, St Mary\u2019s University, London, United Kingdom"},{"name":"Football Club Twente, Enschede, the Netherlands"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mark","family":"Waldron","sequence":"additional","affiliation":[{"name":"A-STEM Research Centre, College of Engineering, Swansea University, Swansea, United Kingdom"},{"name":"School of Health and Behavioural Sciences, University of the Sunshine Coast, QLD, Australia"},{"name":"Welsh Institute of Performance Science, Swansea University, Swansea, United Kingdom"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Louis P.","family":"Howe","sequence":"additional","affiliation":[{"name":"School of Sport, Rehabilitation and Exercise Sciences, University of Essex, Colchester, United Kingdom"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Stephen D.","family":"Patterson","sequence":"additional","affiliation":[{"name":"Faculty of Sport, Health and Applied Science, St Mary\u2019s University, London, United Kingdom"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jason","family":"Moran","sequence":"additional","affiliation":[{"name":"School of Sport, Rehabilitation and Exercise Sciences, University of Essex, Colchester, United Kingdom"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ben","family":"Jones","sequence":"additional","affiliation":[{"name":"School of Sport, Rehabilitation and Exercise Sciences, University of Essex, Colchester, United Kingdom"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Dawson J.","family":"Kidgell","sequence":"additional","affiliation":[{"name":"Department of Physiotherapy, School of Primary and Allied Health Care, Faculty of Medicine, Nursing and Health Science, Monash University, Melbourne, Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jamie","family":"Tallent","sequence":"additional","affiliation":[{"name":"School of Sport, Rehabilitation and Exercise Sciences, University of Essex, Colchester, United Kingdom"},{"name":"Department of Physiotherapy, School of Primary and Allied Health Care, Faculty of Medicine, Nursing and Health Science, Monash University, Melbourne, Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"100","reference":[{"issue":"7","key":"r1","series-title":"J Sports Sci","doi-asserted-by":"publisher","first-page":"665","DOI":"10.1080\/02640410500482529","article-title":"Physical and metabolic demands of training and match-play in the elite football player","volume":"24","author":"Bangsbo J","year":"2006","unstructured":"Bangsbo J, Mohr M, Krustrup P. 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