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Funct. Morphol. Kinesiol.","JFMK"],"abstract":"<jats:p>Background: Futsal is a high-intensity, intermittent team sport, yet laboratory protocols that reproduce its substitution-based running demands remain scarce. This study examined the physiological, neuromuscular, and perceptual responses to the Futsal Intermittent Treadmill Protocol (FITP), a laboratory-based protocol designed to replicate the intermittent high-intensity running demands of futsal. Methods: Ten male, national-level (Tier 3) futsal players completed four bouts of intermittent running (6\u201320 km\u00b7h\u22121) reflecting typical substitution patterns. Measurements included oxygen consumption (VO2), heart rate (HR), blood lactate concentration ([BLa\u2212]), rating of perceived exertion (RPE), total quality recovery (TQR), and countermovement jump (CMJ) performance. Responses were analyzed using one-way repeated-measures ANOVA. Results: HR and %HRmax increased significantly across bouts (p &lt; 0.001; \u03b72p = 0.84 for both), reaching values typical of competitive matches. Relative VO2 and %VO2max remained stable, while RPE increased and TQR decreased progressively (p &lt; 0.001; \u03b72p = 0.59\u20130.62). Blood lactate levels and the CMJ mechanical variables showed no significant changes, indicating no systematic neuromuscular fatigue pattern. Conclusions: The FITP induces substantial cardiovascular and perceptual strain that is physiologically comparable to high-intensity futsal, while metabolic and neuromuscular responses remain stable. The protocol may provide a controlled, repeatable method for assessing intermittent running tolerance; however, optimizing its role in physical evaluation, top-up conditioning, and return-to-play monitoring will benefit from future research confirming its ongoing consistency and field application.<\/jats:p>","DOI":"10.3390\/jfmk11030296","type":"journal-article","created":{"date-parts":[[2026,7,27]],"date-time":"2026-07-27T16:11:56Z","timestamp":1785168716000},"page":"296","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["The FITP: A Controlled Intermittent Running Test for Futsal Athletes"],"prefix":"10.3390","volume":"11","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-9516-8516","authenticated-orcid":false,"given":"Jo\u00e3o Nuno","family":"Ribeiro","sequence":"first","affiliation":[{"name":"SPRINT, Sport Physical Activity and Health Research & Innovation Center, Polytechnic University of Guarda, 6300-559 Guarda, Portugal"},{"name":"FPF Academy, Federa\u00e7\u00e3o Portuguesa de Futebol, 1495-218 Oeiras, Portugal"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7894-3728","authenticated-orcid":false,"given":"Farzad","family":"Yousefian","sequence":"additional","affiliation":[{"name":"FPF Academy, Federa\u00e7\u00e3o Portuguesa de Futebol, 1495-218 Oeiras, Portugal"},{"name":"CIDESD, Research Center in Sports Sciences, Health Sciences and Human Development, Department of Sport Sciences, Universidade da Beira Interior, 6200-001 Covilh\u00e3, Portugal"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8557-5257","authenticated-orcid":false,"given":"Raul Filipe","family":"Bartolomeu","sequence":"additional","affiliation":[{"name":"SPRINT, Sport Physical Activity and Health Research & Innovation Center, Polytechnic University of Guarda, 6300-559 Guarda, Portugal"},{"name":"Polytechnic University of Bragan\u00e7a, 5300-253 Bragan\u00e7a, Portugal"},{"name":"Research Centre for Active Living and Wellbeing (LIVEWELL), Instituto Polit\u00e9cnico de Bragan\u00e7a, 5300-253 Bragan\u00e7a, Portugal"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9898-847X","authenticated-orcid":false,"given":"Faber","family":"Martins","sequence":"additional","affiliation":[{"name":"SPRINT, Sport Physical Activity and Health Research & Innovation Center, Polytechnic University of Guarda, 6300-559 Guarda, Portugal"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5762-4653","authenticated-orcid":false,"given":"Konstantinos","family":"Spyrou","sequence":"additional","affiliation":[{"name":"UCAM Research Center for High Performance Sport, UCAM Universidad Cat\u00f3lica de Murcia, 30107 Murcia, Spain"},{"name":"Faculty of Sport Sciences, Catholic University of Murcia (UCAM), 30107 Murcia, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Bruno","family":"Travassos","sequence":"additional","affiliation":[{"name":"FPF Academy, Federa\u00e7\u00e3o Portuguesa de Futebol, 1495-218 Oeiras, Portugal"},{"name":"CIDESD, Research Center in Sports Sciences, Health Sciences and Human Development, Department of Sport Sciences, Universidade da Beira Interior, 6200-001 Covilh\u00e3, Portugal"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Carolina","family":"Vila-Ch\u00e3","sequence":"additional","affiliation":[{"name":"SPRINT, Sport Physical Activity and Health Research & Innovation Center, Polytechnic University of Guarda, 6300-559 Guarda, Portugal"},{"name":"Escola Superior de Desporto, Bem-Estar e Sistemas Biom\u00e9dicos, Instituto Polit\u00e9cnico do C\u00e1vado e do Ave, 4750-810 Vila Frescainha, Portugal"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4675-2959","authenticated-orcid":false,"given":"Pedro Tiago","family":"Esteves","sequence":"additional","affiliation":[{"name":"SPRINT, Sport Physical Activity and Health Research & Innovation Center, Polytechnic University of Guarda, 6300-559 Guarda, Portugal"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2026,7,27]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"76","DOI":"10.1016\/j.jesf.2017.09.001","article-title":"Physical and Physiological Demands of Futsal","volume":"15","author":"Naser","year":"2017","journal-title":"J. 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