{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,21]],"date-time":"2026-04-21T12:08:30Z","timestamp":1776773310921,"version":"3.51.2"},"reference-count":49,"publisher":"MDPI AG","issue":"1","license":[{"start":{"date-parts":[[2025,1,20]],"date-time":"2025-01-20T00:00:00Z","timestamp":1737331200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Research Center in Physical Activity, Health and Leisure (CIAFEL), Faculty of Sport, University of Porto (FADEUP)","award":["UIDB\/00617\/2020"],"award-info":[{"award-number":["UIDB\/00617\/2020"]}]},{"name":"Research Center in Physical Activity, Health and Leisure (CIAFEL), Faculty of Sport, University of Porto (FADEUP)","award":["LA\/P\/0064\/2020"],"award-info":[{"award-number":["LA\/P\/0064\/2020"]}]},{"name":"Funda\u00e7\u00e3o Para a Ci\u00eancia e Tecnologia","award":["UIDB\/00617\/2020"],"award-info":[{"award-number":["UIDB\/00617\/2020"]}]},{"name":"Funda\u00e7\u00e3o Para a Ci\u00eancia e Tecnologia","award":["LA\/P\/0064\/2020"],"award-info":[{"award-number":["LA\/P\/0064\/2020"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sports"],"abstract":"<jats:p>Background: Speed training with resisted sprints has been shown to positively affect neuromuscular performance in soccer players. Various loads, ranging from 10% to 120% of body mass, have demonstrated performance improvements across the spectrum. However, the impact of sprint distance with optimal load on these adaptive responses has yet to be thoroughly described. Objective. To analyze the influence of sprint distance in resisted sprints on muscle performance in young soccer players. Methods. This quantitative study utilized a pre-post experimental design. The sample consisted of 24 young soccer players (15.3 \u00b1 0.68 years; 61.4 \u00b1 7.08 kg; 1.60 \u00b1 0.06 m) randomized into three groups (10, 20, and 30 m) and subjected to 12 sessions of resisted sprint training over six weeks. The volume was homogenized across groups, with a total distance of 120 m for each. The intervention\u2019s effect was analyzed through performance in the isometric mid-thigh pull (IMTP), countermovement jump (CMJ), modified 505 agility test (505 m), and linear sprint tests. Differences were analyzed using a mixed ANOVA, incorporating a between-subjects factor (training group) and a within-subjects factor (pre- and post-intervention). Results. Time-dependent differences were observed in all groups for peak force (PF) (p &lt; 0.001; \u03b72p = 0.62), time to PF (TPF) (p &lt; 0.001; \u03b72p = 0.53), impulse at 50 (p &lt; 0.001; \u03b72p = 0.57), 100 (p &lt; 0.001; \u03b72p = 0.60), and 200 ms (p &lt; 0.001; \u03b72p = 0.67) in IMTP; jump height by impulse-momentum (p &lt; 0.001; \u03b72p = 0.64), rate of force development (p = 0.04; \u03b72p = 0.14), yielding impulse (p &lt; 0.001; \u03b72p = 0.49), and concentric impulse (p = 0.01; \u03b72p = 0.19) in CMJ; time (p &lt; 0.001; \u03b72p = 0.46) in 505 m; and average speed in linear sprint (p = 0.003; \u03b72p = 0.36), with moderate to large effect sizes, regardless of the distance covered. No differences were observed for the interaction between the time* and group or between groups. Conclusion. Performance improvements were independent of the sprint distance, with no differences between training groups. Distances between 10 and 30 m may enhance muscle performance in young soccer players.<\/jats:p>","DOI":"10.3390\/sports13010026","type":"journal-article","created":{"date-parts":[[2025,1,20]],"date-time":"2025-01-20T07:47:37Z","timestamp":1737359257000},"page":"26","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":6,"title":["Optimizing Muscle Performance in Young Soccer Players: Exploring the Impact of Resisted Sprint Training and Its Relationship with Distance Covered"],"prefix":"10.3390","volume":"13","author":[{"given":"Felipe","family":"Hermosilla-Palma","sequence":"first","affiliation":[{"name":"Escuela de Doctorado, Universidad de Las Palmas de Gran Canaria, 35016 Las Palmas de Gran Canaria, Spain"},{"name":"Pedagog\u00eda en Educaci\u00f3n F\u00edsica, Facultad de Educaci\u00f3n, Universidad Aut\u00f3noma de Chile, Talca 3460000, Chile"},{"name":"N\u00facleo de Investigaci\u00f3n en Ciencias de la Motricidad Humana, Universidad Adventista de Chile, Camino a Tanilvoro Km 12, Chill\u00e1n 3780000, Chile"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0517-8209","authenticated-orcid":false,"given":"Juan Francisco","family":"Loro-Ferrer","sequence":"additional","affiliation":[{"name":"Departamento Ciencias Cl\u00ednicas, Universidad de Las Palmas de Gran Canaria, 35016 Las Palmas de Gran Canaria, Spain"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8323-726X","authenticated-orcid":false,"given":"Pablo","family":"Merino-Mu\u00f1oz","sequence":"additional","affiliation":[{"name":"N\u00facleo de Investigaci\u00f3n en Ciencias de la Motricidad Humana, Universidad Adventista de Chile, Camino a Tanilvoro Km 12, Chill\u00e1n 3780000, Chile"},{"name":"Programa de Engenharia Biom\u00e9dica, Instituto Alberto Luiz Coimbra de P\u00f3s-Gradua\u00e7\u00e3o e Pesquisa de Engenharia (COPPE), Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-853, Brazil"}]},{"given":"Nicol\u00e1s","family":"G\u00f3mez-\u00c1lvarez","sequence":"additional","affiliation":[{"name":"N\u00facleo de Investigaci\u00f3n en Ciencias de la Motricidad Humana, Universidad Adventista de Chile, Camino a Tanilvoro Km 12, Chill\u00e1n 3780000, Chile"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0494-0000","authenticated-orcid":false,"given":"Rodrigo","family":"Zacca","sequence":"additional","affiliation":[{"name":"Research Center in Physical Activity, Health and Leisure (CIAFEL), Faculty of Sports, University of Porto (FADEUP), 4200-450 Porto, Portugal"},{"name":"Laboratory for Integrative and Translational Research in Population Health (ITR), 4050-600 Porto, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4058-3242","authenticated-orcid":false,"given":"Hugo","family":"Cerda-Kohler","sequence":"additional","affiliation":[{"name":"Departamento de Educaci\u00f3n F\u00edsica, Deportes y Recreaci\u00f3n, Facultad de Artes y Educaci\u00f3n F\u00edsica, Universidad Metropolitana de Ciencias de la Educaci\u00f3n, Santiago 7760197, Chile"},{"name":"Laboratory of Psychophysiology and Performance in Sports and Combats, Postgraduate Program in Physical Education, School of Physical Education and Sport, Federal University of Rio de Janeiro, Rio de Janeiro 21941-853, Brazil"}]},{"given":"Ciro","family":"Brito","sequence":"additional","affiliation":[{"name":"Department of Physical Education, Federal University of Juiz de Fora, Governador Valadares 35010-180, Brazil"},{"name":"Escuela de Ciencias de la Actividad F\u00edsica, El Deporte y la Salud, Facultad de Ciencias M\u00e9dicas, Universidad de Santiago de Chile, Santiago 8370003, Chile"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2314-0204","authenticated-orcid":false,"given":"Jorge","family":"P\u00e9rez-Contreras","sequence":"additional","affiliation":[{"name":"Escuela de Ciencias del Deporte y Actividad F\u00edsica, Facultad de Salud, Universidad Santo Tomas, Santiago 8370003, Chile"},{"name":"Escuela de Educaci\u00f3n, Mag\u00edster en Evaluaci\u00f3n y Planificaci\u00f3n del Entrenamiento Deportivo, Universidad Vi\u00f1a del Mar, Vi\u00f1a del Mar 2572007, Chile"}]},{"given":"Moacyr","family":"Portes-Junior","sequence":"additional","affiliation":[{"name":"Pedagog\u00eda en Educaci\u00f3n F\u00edsica, Facultad de Educaci\u00f3n, Universidad Aut\u00f3noma de Chile, Talca 3460000, Chile"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1544-2824","authenticated-orcid":false,"given":"Esteban","family":"Aedo-Mu\u00f1oz","sequence":"additional","affiliation":[{"name":"Escuela de Ciencias de la Actividad F\u00edsica, El Deporte y la Salud, Facultad de Ciencias M\u00e9dicas, Universidad de Santiago de Chile, Santiago 8370003, Chile"},{"name":"Laboratorio de Biomec\u00e1nica Deportiva, Unidad de Ciencias Aplicadas al Deporte, Instituto Nacional de Deportes, Santiago 7780421, Chile"}]}],"member":"1968","published-online":{"date-parts":[[2025,1,20]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"70","DOI":"10.1519\/SSC.0000000000000533","article-title":"Physical and Energetic Demand of Soccer: A Brief Review","volume":"42","author":"Dolci","year":"2020","journal-title":"Strength Cond. 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