{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,13]],"date-time":"2026-05-13T18:10:28Z","timestamp":1778695828233,"version":"3.51.4"},"reference-count":39,"publisher":"Ovid Technologies (Wolters Kluwer Health)","issue":"7","content-domain":{"domain":["lww.com","ovid.com"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2021,7]]},"abstract":"<jats:title>Abstract<\/jats:title>\n          <jats:p>Fernandes-Da-Silva, J, Castagna, C, Teixeira, AS, Carminatti, LJ, Francini, L, P\u00f3voas, SCA, and Antonacci Guglielmo, LG. Ecological and construct validity of a repeated sprint test in male youth soccer players. <jats:italic toggle=\"yes\">J Strength Cond Res<\/jats:italic> 35(7): 2000\u20132009, 2021\u2014This study aimed to examine the relationship between a repeated sprint ability (RSA) test (5 bouts of 30-m sprints interspersed by 30 seconds of recovery) and match-related physical performance in male youth soccer players. Although 60 outfield players were evaluated, only data from players who participated in the full matches (<jats:italic toggle=\"yes\">n<\/jats:italic> = 39) were retained (8 central defenders, 7 external defenders, 8 central midfielders, 8 external midfielders, and 8 forwards). To verify the ecological validity of this RSA protocol, the association between the best (RSAbest) and mean (RSAmean) sprint time in the 5 \u00d7 30-m and physical match performance during friendly youth soccer games was examined. Physical match demands were assessed using global positioning system technology (10 Hz) considering distance covered in selected arbitrary speed categories. The absolute speed thresholds were the same for all the players. Players were categorized into 2 groups based on the 5 \u00d7 30-m performance: RSAmean times below (i.e., faster) and above (i.e., slower) the median value. Players with faster RSAmean times covered significantly more distance sprinting during friendly matches (606 \u00b1 204 m, +47.0%; <jats:italic toggle=\"yes\">t<\/jats:italic> = 4.953; effect size = 1.88, 1.24; 2.52, <jats:italic toggle=\"yes\">p<\/jats:italic> \u2264 0.001) compared to their slower counterparts (322 \u00b1 145 m). A large negative correlation (<jats:italic toggle=\"yes\">r<\/jats:italic> = \u22120.63, \u22120.77; \u22120.44, <jats:italic toggle=\"yes\">p<\/jats:italic> \u2264 0.001) was found between RSAbest time (4.59 \u00b1 0.27 seconds) and match sprint distance (457 \u00b1 229 m). Likewise, RSAmean time (4.76 \u00b1 0.25 seconds) was also largely associated (<jats:italic toggle=\"yes\">r<\/jats:italic> = \u22120.60, \u22120.75; \u22120.39; <jats:italic toggle=\"yes\">p<\/jats:italic> \u2264 0.001) with in-game sprinting performance. The results of this study provided evidence to support the construct and ecological validity of the 5 \u00d7 30-m protocol in male youth soccer players. Furthermore, differences in 5 \u00d7 30-m performance explained the amount of sprinting activity performed during the match.<\/jats:p>","DOI":"10.1519\/jsc.0000000000003047","type":"journal-article","created":{"date-parts":[[2019,1,29]],"date-time":"2019-01-29T18:28:31Z","timestamp":1548786511000},"page":"2000-2009","update-policy":"https:\/\/doi.org\/10.1097\/lww.0000000000001000","source":"Crossref","is-referenced-by-count":12,"title":["Ecological and Construct Validity of a Repeated Sprint Test in Male Youth Soccer Players"],"prefix":"10.1519","volume":"35","author":[{"given":"Juliano","family":"Fernandes-Da-Silva","sequence":"first","affiliation":[{"name":"Research Group for Development of Football and Futsal, Sports Center, Federal University of Santa Catarina, Florian\u00f3polis, Brazil;"}]},{"given":"Carlo","family":"Castagna","sequence":"additional","affiliation":[{"name":"Football Training and Biomechanics Laboratory, Technical Department, Italian Football Federation (FIGC), Coverciano, Florence, Italy;"}]},{"given":"Anderson Santiago","family":"Teixeira","sequence":"additional","affiliation":[{"name":"Research Group for Development of Football and Futsal, Sports Center, Federal University of Santa Catarina, Florian\u00f3polis, Brazil;"},{"name":"Physical Effort Laboratory, Sports Center, Federal University of Santa Catarina, Florian\u00f3polis, Brazil;"}]},{"given":"Lorival Jos\u00e9","family":"Carminatti","sequence":"additional","affiliation":[{"name":"Physical Effort Laboratory, Sports Center, Federal University of Santa Catarina, Florian\u00f3polis, Brazil;"},{"name":"Morpho-Functional Research Laboratory, Center for Health Sciences and Sport of the University of the State of Santa Catarina, Florian\u00f3polis, Brazil; and"}]},{"given":"Lorenzo","family":"Francini","sequence":"additional","affiliation":[{"name":"Football Training and Biomechanics Laboratory, Technical Department, Italian Football Federation (FIGC), Coverciano, Florence, Italy;"}]},{"given":"Susana C.A.","family":"P\u00f3voas","sequence":"additional","affiliation":[{"name":"Research Center in Sports Sciences, Health Sciences and Human Development, CIDESD, University Institute of Maia, ISMAI, Maia, Portugal"}]},{"given":"Luiz Guilherme","family":"Antonacci Guglielmo","sequence":"additional","affiliation":[{"name":"Physical Effort Laboratory, Sports Center, Federal University of Santa Catarina, Florian\u00f3polis, Brazil;"}]}],"member":"276","reference":[{"key":"R1-20250806","doi-asserted-by":"crossref","first-page":"26","DOI":"10.23736\/S0022-4707.16.05776-5","article-title":"Repeated sprint ability in soccer players: Associations with physiological and neuromuscular factors","volume":"57","author":"Baldi","year":"2017","journal-title":"J Sports Med Phys Fitness"},{"key":"R2-20250806","doi-asserted-by":"crossref","first-page":"1095","DOI":"10.1055\/s-0034-1375695","article-title":"The evolution of physical and technical performance parameters in the 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