{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,15]],"date-time":"2026-09-15T21:19:39Z","timestamp":1789507179509,"version":"build-2803163510"},"reference-count":48,"publisher":"Elsevier BV","license":[{"start":{"date-parts":[[2025,5,1]],"date-time":"2025-05-01T00:00:00Z","timestamp":1746057600000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/www.elsevier.com\/tdm\/userlicense\/1.0\/"},{"start":{"date-parts":[[2025,5,1]],"date-time":"2025-05-01T00:00:00Z","timestamp":1746057600000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/www.elsevier.com\/legal\/tdmrep-license"},{"start":{"date-parts":[[2025,5,1]],"date-time":"2025-05-01T00:00:00Z","timestamp":1746057600000},"content-version":"stm-asf","delay-in-days":0,"URL":"https:\/\/doi.org\/10.15223\/policy-017"},{"start":{"date-parts":[[2025,5,1]],"date-time":"2025-05-01T00:00:00Z","timestamp":1746057600000},"content-version":"stm-asf","delay-in-days":0,"URL":"https:\/\/doi.org\/10.15223\/policy-037"},{"start":{"date-parts":[[2025,5,1]],"date-time":"2025-05-01T00:00:00Z","timestamp":1746057600000},"content-version":"stm-asf","delay-in-days":0,"URL":"https:\/\/doi.org\/10.15223\/policy-012"},{"start":{"date-parts":[[2025,5,1]],"date-time":"2025-05-01T00:00:00Z","timestamp":1746057600000},"content-version":"stm-asf","delay-in-days":0,"URL":"https:\/\/doi.org\/10.15223\/policy-029"},{"start":{"date-parts":[[2025,5,1]],"date-time":"2025-05-01T00:00:00Z","timestamp":1746057600000},"content-version":"stm-asf","delay-in-days":0,"URL":"https:\/\/doi.org\/10.15223\/policy-004"}],"content-domain":{"domain":["clinicalkey.com","clinicalkey.com.au","clinicalkey.es","clinicalkey.fr","clinicalkey.jp","elsevier.com","sciencedirect.com"],"crossmark-restriction":true},"short-container-title":["Physical Therapy in Sport"],"published-print":{"date-parts":[[2025,5]]},"DOI":"10.1016\/j.ptsp.2025.02.007","type":"journal-article","created":{"date-parts":[[2025,3,3]],"date-time":"2025-03-03T12:06:10Z","timestamp":1741003570000},"page":"39-47","update-policy":"https:\/\/doi.org\/10.1016\/elsevier_cm_policy","source":"Crossref","is-referenced-by-count":6,"special_numbering":"C","title":["Less pain, same gain? A randomized controlled trial comparing assisted- versus non-assisted Nordic Hamstring exercise training in elite youth football players"],"prefix":"10.1016","volume":"73","author":[{"given":"Lasse","family":"Ish\u00f8i","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Simon","family":"Meincke","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Anders P.","family":"Lund","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Anders","family":"Stenholm","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0860-5840","authenticated-orcid":false,"given":"Matt","family":"DeLang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4323-3042","authenticated-orcid":false,"given":"Kasper","family":"Thornton","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kristian","family":"Thorborg","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"78","reference":[{"key":"10.1016\/j.ptsp.2025.02.007_bib1","doi-asserted-by":"crossref","first-page":"826","DOI":"10.1111\/sms.13909","article-title":"Nordic Hamstring Exercise training induces improved lower-limb swing phase mechanics and sustained strength preservation in sprinters","volume":"31","author":"Alt","year":"2021","journal-title":"Scandinavian Journal of Medicine & Science in Sports"},{"key":"10.1016\/j.ptsp.2025.02.007_bib2","article-title":"Assisted or unassisted nordic hamstring exercise? - resistance exercise determinants at a glance","volume":"1\u201315","author":"Alt","year":"2021","journal-title":"Sports Biomechanics"},{"key":"10.1016\/j.ptsp.2025.02.007_bib3","doi-asserted-by":"crossref","first-page":"65","DOI":"10.1111\/sms.12868","article-title":"Velocity-specific and time-dependent adaptations following a standardized Nordic Hamstring Exercise training","volume":"28","author":"Alt","year":"2018","journal-title":"Scandinavian Journal of Medicine & Science in Sports"},{"key":"10.1016\/j.ptsp.2025.02.007_bib4","doi-asserted-by":"crossref","first-page":"91","DOI":"10.1186\/s40798-021-00383-x","article-title":"The ANHEQ evaluation criteria: Introducing reliable rating scales for assessing nordic hamstring exercise quality","volume":"7","author":"Alt","year":"2021","journal-title":"Sports Medicine. - Open"},{"key":"10.1016\/j.ptsp.2025.02.007_bib5","doi-asserted-by":"crossref","DOI":"10.1136\/bmjsem-2023-001699","article-title":"Performing nordic hamstring strength testing with additional weight affects the maximal eccentric force measured: Do not compare apples to oranges","volume":"9","author":"Amundsen","year":"2023","journal-title":"BMJ Open Sport Exercise. Medicine."},{"key":"10.1016\/j.ptsp.2025.02.007_bib6","doi-asserted-by":"crossref","first-page":"1466","DOI":"10.1136\/bjsports-2015-094826","article-title":"Evidence-based hamstring injury prevention is not adopted by the majority of champions league or Norwegian premier league football teams: The nordic hamstring survey","volume":"49","author":"Bahr","year":"2015","journal-title":"British Journal of Sports Medicine"},{"key":"10.1016\/j.ptsp.2025.02.007_bib8","doi-asserted-by":"crossref","first-page":"1","DOI":"10.18637\/jss.v067.i01","article-title":"Fitting linear mixed-effects models using lme4","volume":"67","author":"Bates","year":"2015","journal-title":"Journal of Statistical Software"},{"key":"10.1016\/j.ptsp.2025.02.007_bib7","series-title":"Matrix: Sparse and dense Matrix classes and methods","author":"Bates","year":"2024"},{"key":"10.1016\/j.ptsp.2025.02.007_bib9","doi-asserted-by":"crossref","first-page":"542","DOI":"10.1111\/sms.14317","article-title":"The dose-response of pain throughout a Nordic hamstring exercise intervention","volume":"33","author":"Behan","year":"2023","journal-title":"Scandinavian Journal of Medicine & Science in Sports"},{"key":"10.1016\/j.ptsp.2025.02.007_bib10","doi-asserted-by":"crossref","first-page":"469","DOI":"10.1136\/bjsports-2016-096130","article-title":"Impact of the Nordic hamstring and hip extension exercises on hamstring architecture and morphology: Implications for injury prevention","volume":"51","author":"Bourne","year":"2017","journal-title":"British Journal of Sports Medicine"},{"key":"10.1016\/j.ptsp.2025.02.007_bib11","doi-asserted-by":"crossref","first-page":"1219","DOI":"10.1007\/s40279-023-01843-y","article-title":"Building for the future: A systematic review of the effects of eccentric resistance training on measures of physical performance in youth athletes","volume":"53","author":"Bright","year":"2023","journal-title":"Sports Medicine"},{"key":"10.1016\/j.ptsp.2025.02.007_bib12","doi-asserted-by":"crossref","first-page":"2715","DOI":"10.1519\/JSC.0000000000003689","article-title":"Kinetic and electromyographic responses to traditional and assisted nordic hamstring exercise","volume":"34","author":"Burrows","year":"2020","journal-title":"The Journal of Strength & Conditioning Research"},{"key":"10.1016\/j.ptsp.2025.02.007_bib13","first-page":"576","article-title":"The uptake of nordic hamstring exercise program for injury prevention in major league soccer and its barriers to implementation in practice","volume":"31","author":"Chesterton","year":"2022","journal-title":"Journal of Sport Rehabilitation"},{"key":"10.1016\/j.ptsp.2025.02.007_bib14","doi-asserted-by":"crossref","first-page":"214","DOI":"10.1002\/tsm2.209","article-title":"Hamstring injury prevention practices and compliance of the Nordic hamstring program in English professional football","volume":"4","author":"Chesterton","year":"2021","journal-title":"Transl. SPORTS Medicine"},{"key":"10.1016\/j.ptsp.2025.02.007_bib15","article-title":"Chronic adaptations to eccentric training: A systematic review","author":"Douglas","year":"2016","journal-title":"Sports Medicine"},{"key":"10.1016\/j.ptsp.2025.02.007_bib16","doi-asserted-by":"crossref","first-page":"990","DOI":"10.1123\/ijspp.2019-0184","article-title":"Influence of maturation status on eccentric hamstring strength improvements in youth male soccer players after the nordic hamstring exercise","volume":"15","author":"Drury","year":"2020","journal-title":"International Journal of Sports Physiology and Performance"},{"key":"10.1016\/j.ptsp.2025.02.007_bib17","doi-asserted-by":"crossref","first-page":"73","DOI":"10.1111\/sms.13701","article-title":"Progression from youth to professional soccer: A longitudinal study of successful and unsuccessful academy graduates","volume":"31","author":"Dugdale","year":"2021","journal-title":"Scandinavian Journal of Medicine & Science in Sports"},{"key":"10.1016\/j.ptsp.2025.02.007_bib18","doi-asserted-by":"crossref","DOI":"10.1136\/bmjsem-2022-001368","article-title":"Still poorly adopted in male professional football: But teams that used the nordic hamstring exercise in team training had fewer hamstring injuries - a retrospective survey of 17 teams of the UEFA elite club injury study during the 2020-2021 season","volume":"8","author":"Ekstrand","year":"2022","journal-title":"BMJ Open Sport Exercise. Medicine."},{"key":"10.1016\/j.ptsp.2025.02.007_bib19","doi-asserted-by":"crossref","first-page":"292","DOI":"10.1136\/bjsports-2021-105407","article-title":"Hamstring injury rates have increased during recent seasons and now constitute 24% of all injuries in men\u2019s professional football: the UEFA Elite Club Injury Study from 2001\/02 to 2021\/22","volume":"57","author":"Ekstrand","year":"2023","journal-title":"British Journal of Sports Medicine"},{"key":"10.1016\/j.ptsp.2025.02.007_bib20","doi-asserted-by":"crossref","DOI":"10.1136\/bmjsem-2022-001523","article-title":"Low adoption in women's professional football: Teams that used the nordic hamstring exercise in the team training had fewer match hamstring injuries","volume":"9","author":"Ekstrand","year":"2023","journal-title":"BMJ Open Sport Exercise. Medicine"},{"key":"10.1016\/j.ptsp.2025.02.007_bib21","first-page":"109","article-title":"A new approach to monitoring exercise training","volume":"15","author":"Foster","year":"2001","journal-title":"The Journal of Strength & Conditioning Research"},{"key":"10.1016\/j.ptsp.2025.02.007_bib22","doi-asserted-by":"crossref","first-page":"1119","DOI":"10.23736\/S0022-4707.18.08703-0","article-title":"The effects of sprint training and the Nordic hamstring exercise on eccentric hamstring strength and sprint performance in adolescent athletes","volume":"59","author":"Freeman","year":"2019","journal-title":"The Journal of Sports Medicine and Physical Fitness"},{"key":"10.1016\/j.ptsp.2025.02.007_bib23","doi-asserted-by":"crossref","first-page":"349","DOI":"10.1136\/bjsports-2014-093466","article-title":"Eccentric training for prevention of hamstring injuries may depend on intervention compliance: A systematic review and meta-analysis","volume":"49","author":"Goode","year":"2015","journal-title":"British Journal of Sports Medicine"},{"key":"10.1016\/j.ptsp.2025.02.007_bib24","doi-asserted-by":"crossref","first-page":"992","DOI":"10.1111\/sms.13016","article-title":"Region-dependent hamstrings activity in Nordic hamstring exercise and stiff-leg deadlift defined with high-density electromyography","volume":"28","author":"Hegyi","year":"2018","journal-title":"Scandinavian Journal of Medicine & Science in Sports"},{"key":"10.1016\/j.ptsp.2025.02.007_bib25","doi-asserted-by":"crossref","first-page":"494","DOI":"10.1097\/JSM.0b013e31815aed57","article-title":"Convergent evidence for construct validity of a 7-point Likert scale of lower limb muscle soreness","volume":"17","author":"Impellizzeri","year":"2007","journal-title":"Clinical Journal of Sport Medicine"},{"key":"10.1016\/j.ptsp.2025.02.007_bib26","doi-asserted-by":"crossref","first-page":"1663","DOI":"10.1080\/02640414.2017.1409609","article-title":"Effects of the Nordic Hamstring exercise on sprint capacity in male football players: A randomized controlled trial","volume":"36","author":"Ishoi","year":"2018","journal-title":"Journal of Sports Sciences"},{"key":"10.1016\/j.ptsp.2025.02.007_bib27","doi-asserted-by":"crossref","first-page":"528","DOI":"10.1136\/bjsports-2019-101228","article-title":"Diagnosis, prevention and treatment of common lower extremity muscle injuries in sport \u2013 grading the evidence: A statement paper commissioned by the Danish society of sports physical therapy (DSSF)","volume":"54","author":"Ish\u00f8i","year":"2020","journal-title":"British Journal of Sports Medicine"},{"key":"10.1016\/j.ptsp.2025.02.007_bib28","series-title":"rstatix: Pipe-Friendly framework for basic statistical tests","author":"Kassambara","year":"2023"},{"key":"10.1016\/j.ptsp.2025.02.007_bib29","doi-asserted-by":"crossref","first-page":"1","DOI":"10.18637\/jss.v082.i13","article-title":"lmerTest package: Tests in linear mixed effects models","volume":"82","author":"Kuznetsova","year":"2017","journal-title":"Journal of Statistical Software"},{"key":"10.1016\/j.ptsp.2025.02.007_bib30","doi-asserted-by":"crossref","first-page":"81","DOI":"10.1123\/ijspp.2018-0947","article-title":"Hamstring eccentric strengthening program: Does training volume matter?","volume":"15","author":"Lacome","year":"2020","journal-title":"International Journal of Sports Physiology and Performance"},{"key":"10.1016\/j.ptsp.2025.02.007_bib31","doi-asserted-by":"crossref","first-page":"405","DOI":"10.1080\/24733938.2021.1943756","article-title":"Injuries are negatively associated with player progression in an elite football academy","volume":"6","author":"Larruskain","year":"2022","journal-title":"Science and Medicine in Football"},{"key":"10.1016\/j.ptsp.2025.02.007_bib32","doi-asserted-by":"crossref","first-page":"1324","DOI":"10.1111\/sms.13933","article-title":"Injuries in youth football and the relationship to player maturation: An analysis of time-loss injuries during four seasons in an English elite male football academy","volume":"31","author":"Light","year":"2021","journal-title":"Scandinavian Journal of Medicine & Science in Sports"},{"key":"10.1016\/j.ptsp.2025.02.007_bib33","doi-asserted-by":"crossref","first-page":"493","DOI":"10.1136\/bjsports-2020-102859","article-title":"Injury incidence and burden in a youth elite football academy: A four-season prospective study of 551 players aged from under 9 to under 19 years","volume":"55","author":"Materne","year":"2021","journal-title":"British Journal of Sports Medicine"},{"key":"10.1016\/j.ptsp.2025.02.007_bib34","doi-asserted-by":"crossref","first-page":"84","DOI":"10.1519\/SSC.0000000000000084","article-title":"The assisted nordic hamstring curl","volume":"37","author":"Matthews","year":"2015","journal-title":"Strength and Conditioning Journal"},{"key":"10.1016\/j.ptsp.2025.02.007_bib35","doi-asserted-by":"crossref","first-page":"1667","DOI":"10.1007\/s40279-020-01315-7","article-title":"Exercise-based strategies to prevent muscle injury in male elite footballers: An expert-led Delphi survey of 21 practitioners belonging to 18 teams from the Big-5 European leagues","volume":"50","author":"McCall","year":"2020","journal-title":"Sports Medicine"},{"key":"10.1016\/j.ptsp.2025.02.007_bib36","doi-asserted-by":"crossref","first-page":"311","DOI":"10.1046\/j.1600-0838.2003.367.x","article-title":"A 10-week randomized trial comparing eccentric vs. concentric hamstring strength training in well-trained soccer players","volume":"14","author":"Mjolsnes","year":"2004","journal-title":"Scandinavian Journal of Medicine & Science in Sports"},{"key":"10.1016\/j.ptsp.2025.02.007_bib37","doi-asserted-by":"crossref","first-page":"1935","DOI":"10.1007\/s40279-021-01474-1","article-title":"Is pre-season eccentric strength testing during the Nordic Hamstring exercise associated with future hamstring strain injury? A systematic review and meta-analysis","volume":"51","author":"Opar","year":"2021","journal-title":"Sports Medicine Auckland NZ"},{"key":"10.1016\/j.ptsp.2025.02.007_bib38","doi-asserted-by":"crossref","first-page":"636","DOI":"10.2519\/jospt.2013.4837","article-title":"A novel device using the nordic hamstring exercise to assess eccentric knee flexor strength: A reliability and retrospective injury study","volume":"43","author":"Opar","year":"2013","journal-title":"Journal of Orthopaedic & Sports Physical Therapy"},{"key":"10.1016\/j.ptsp.2025.02.007_bib39","first-page":"37","article-title":"Resistance training with slow speed of movement is better for hypertrophy and muscle strength gains than fast speed of movement","volume":"5","author":"Pereira","year":"2016","journal-title":"International Journal of Applied Exercise Physiology"},{"key":"10.1016\/j.ptsp.2025.02.007_bib40","doi-asserted-by":"crossref","first-page":"1423","DOI":"10.1080\/02640414.2017.1389515","article-title":"Injury prevention in male youth soccer: Current practices and perceptions of practitioners working at elite English academies","volume":"36","author":"Read","year":"2018","journal-title":"Journal of Sports Sciences"},{"key":"10.1016\/j.ptsp.2025.02.007_bib41","doi-asserted-by":"crossref","first-page":"882","DOI":"10.1016\/j.cmet.2024.04.005","article-title":"Exploratory physiological experiments are not clinical trials","volume":"36","author":"Richter","year":"2024","journal-title":"Cell Metabolism"},{"key":"10.1016\/j.ptsp.2025.02.007_bib42","doi-asserted-by":"crossref","first-page":"911","DOI":"10.1080\/02640414.2018.1535786","article-title":"Acute adaptations and subsequent preservation of strength and speed measures following a Nordic hamstring curl intervention: A randomised controlled trial","volume":"37","author":"Siddle","year":"2019","journal-title":"Journal of Sports Sciences"},{"key":"10.1016\/j.ptsp.2025.02.007_bib43","doi-asserted-by":"crossref","first-page":"49","DOI":"10.1080\/15438627.2022.2079984","article-title":"A low-volume Nordic hamstring curl programme improves change of direction ability, despite no architectural, strength or speed adaptations in elite youth soccer players","volume":"32","author":"Siddle","year":"2024","journal-title":"Research in Sports Medicine"},{"key":"10.1016\/j.ptsp.2025.02.007_bib44","unstructured":"St\u00f8ve, M. P., Kristensen, M. K., Nielsen, J. & Madsen, L. D. Validity and intrarater reliability of the FysioMeter\u2014measuring eccentric knee flexor force during the nordic hamstring exercise. Measurement in Physical Education and Exercise Science 0, 1\u201310."},{"key":"10.1016\/j.ptsp.2025.02.007_bib45","doi-asserted-by":"crossref","first-page":"1524","DOI":"10.1136\/bjsports-2015-095362","article-title":"Short biceps femoris fascicles and eccentric knee flexor weakness increase the risk of hamstring injury in elite football (soccer): A prospective cohort study","volume":"50","author":"Timmins","year":"2016","journal-title":"British Journal of Sports Medicine"},{"key":"10.1016\/j.ptsp.2025.02.007_bib46","doi-asserted-by":"crossref","first-page":"643","DOI":"10.1007\/s00421-006-0238-1","article-title":"New fundamental resistance exercise determinants of molecular and cellular muscle adaptations","volume":"97","author":"Toigo","year":"2006","journal-title":"European Journal of Applied Physiology"},{"key":"10.1016\/j.ptsp.2025.02.007_bib47","doi-asserted-by":"crossref","first-page":"1316","DOI":"10.1177\/0363546515574057","article-title":"The preventive effect of the nordic hamstring exercise on hamstring injuries in amateur soccer players: A randomized controlled trial","volume":"43","author":"van der Horst","year":"2015","journal-title":"The American Journal of Sports Medicine"},{"key":"10.1016\/j.ptsp.2025.02.007_bib48","doi-asserted-by":"crossref","first-page":"997","DOI":"10.1111\/sms.14158","article-title":"Muscle forces and fascicle behavior during three hamstring exercises","volume":"32","author":"Van Hooren","year":"2022","journal-title":"Scand. Scandinavian Journal of Medicine & Science in Sports."}],"container-title":["Physical Therapy in Sport"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/api.elsevier.com\/content\/article\/PII:S1466853X25000379?httpAccept=text\/xml","content-type":"text\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/api.elsevier.com\/content\/article\/PII:S1466853X25000379?httpAccept=text\/plain","content-type":"text\/plain","content-version":"vor","intended-application":"text-mining"}],"deposited":{"date-parts":[[2026,5,2]],"date-time":"2026-05-02T07:32:23Z","timestamp":1777707143000},"score":1,"resource":{"primary":{"URL":"https:\/\/linkinghub.elsevier.com\/retrieve\/pii\/S1466853X25000379"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2025,5]]},"references-count":48,"alternative-id":["S1466853X25000379"],"URL":"https:\/\/doi.org\/10.1016\/j.ptsp.2025.02.007","relation":{},"ISSN":["1466-853X"],"issn-type":[{"value":"1466-853X","type":"print"}],"subject":[],"published":{"date-parts":[[2025,5]]},"assertion":[{"value":"Elsevier","name":"publisher","label":"This article is maintained by"},{"value":"Less pain, same gain? A randomized controlled trial comparing assisted- versus non-assisted Nordic Hamstring exercise training in elite youth football players","name":"articletitle","label":"Article Title"},{"value":"Physical Therapy in Sport","name":"journaltitle","label":"Journal Title"},{"value":"https:\/\/doi.org\/10.1016\/j.ptsp.2025.02.007","name":"articlelink","label":"CrossRef DOI link to publisher maintained version"},{"value":"article","name":"content_type","label":"Content Type"},{"value":"\u00a9 2025 Elsevier Ltd. All rights are reserved, including those for text and data mining, AI training, and similar technologies.","name":"copyright","label":"Copyright"}]}}