{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,12,14]],"date-time":"2025-12-14T16:09:26Z","timestamp":1765728566157,"version":"3.44.0"},"reference-count":0,"publisher":"Human Kinetics","issue":"2","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2016,5]]},"abstract":"<jats:sec sec-type=\"purpose\"><jats:title>Purpose:<\/jats:title><jats:p>The reliability and construct validity of three age-adapted-intensity Yo-Yo tests were evaluated in untrained (<jats:italic>n<\/jats:italic> = 67) vs. soccer-trained (<jats:italic>n<\/jats:italic> = 65) 9- to 16-year-old schoolgirls.<\/jats:p><\/jats:sec><jats:sec sec-type=\"methods\"><jats:title>Methods:<\/jats:title><jats:p>Tests were performed 7 days apart for reliability (9- to 11-year-old: Yo-Yo intermittent recovery level 1 children\u2019s test; 12- to 13-yearold: Yo-Yo intermittent endurance level 1; and 14- to 16-year-old: Yo-Yo intermittent endurance level 2).<\/jats:p><\/jats:sec><jats:sec sec-type=\"results\"><jats:title>Results:<\/jats:title><jats:p>Yo-Yo distance covered was 40% (776 \u00b1 324 vs. 556 \u00b1 156 m), 85% (1252 \u00b1 484 vs. 675 \u00b1 252 m) and 138% (674 \u00b1 336 vs. 283 \u00b1 66 m) greater (<jats:italic>p<\/jats:italic> \u2264 .010) for the soccer-trained than for the untrained girls aged 9\u201311, 12\u201313 and 14\u201316 years, respectively. Typical errors of measurement for Yo-Yo distance covered, expressed as a percentage of the coefficient of variation (confidence limits), were 10.1% (8.1\u201313.7%), 11.0% (8.6\u201315.4%) and 11.6% (9.2\u201316.1%) for soccer players, and 11.5% (9.1\u201315.8%), 14.1% (11.0\u201319.8%) and 10.6% (8.5\u201314.2%) for untrained girls, aged 9\u201311, 12\u201313 and 14\u201316, respectively. Intraclass correlation coefficient values for test-retest were excellent (0.795\u20130.973) in both groups. No significant differences were observed in relative exercise peak heart rate (%HR<jats:sub>peak<\/jats:sub>) between groups during test and retest.<\/jats:p><\/jats:sec><jats:sec sec-type=\"conclusion\"><jats:title>Conclusion:<\/jats:title><jats:p>The Yo-Yo tests are reliable for determining intermittent-exercise capacity and %HR<jats:sub>peak<\/jats:sub> for soccer players and untrained 9- to 16-year-old girls. They also possess construct validity with better performances for soccer players compared with untrained age-matched girls, despite similar %HR<jats:sub>peak<\/jats:sub>.<\/jats:p><\/jats:sec>","DOI":"10.1123\/pes.2015-0212","type":"journal-article","created":{"date-parts":[[2015,12,16]],"date-time":"2015-12-16T11:25:00Z","timestamp":1450265100000},"page":"321-330","source":"Crossref","is-referenced-by-count":34,"title":["Reliability and Construct Validity of Yo-Yo Tests in Untrained and Soccer-Trained Schoolgirls Aged 9\u201316"],"prefix":"10.1123","volume":"28","author":[{"given":"Susana C. A.","family":"P\u00f3voas","sequence":"first","affiliation":[{"name":"University Institute of Maia"}]},{"given":"Carlo","family":"Castagna","sequence":"additional","affiliation":[{"name":"University of Rome Tor Vergata"}]},{"given":"Jos\u00e9 Manuel da Costa","family":"Soares","sequence":"additional","affiliation":[{"name":"University of Porto"}]},{"given":"Pedro","family":"Silva","sequence":"additional","affiliation":[{"name":"University of Porto"}]},{"given":"Manuel","family":"Coelho-e-Silva","sequence":"additional","affiliation":[{"name":"University of Coimbra"}]},{"given":"Fernando","family":"Matos","sequence":"additional","affiliation":[{"name":"University of Beira Interior"}]},{"given":"Peter","family":"Krustrup","sequence":"additional","affiliation":[{"name":"University of Copenhagen"}]}],"member":"100","container-title":["Pediatric Exercise Science"],"original-title":[],"link":[{"URL":"https:\/\/journals.humankinetics.com\/view\/journals\/pes\/28\/2\/article-p321.xml","content-type":"text\/html","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/journals.humankinetics.com\/downloadpdf\/journals\/pes\/28\/2\/article-p321.xml","content-type":"text\/html","content-version":"vor","intended-application":"syndication"},{"URL":"https:\/\/journals.humankinetics.com\/downloadpdf\/journals\/pes\/28\/2\/article-p321.xml","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,8,27]],"date-time":"2025-08-27T23:08:02Z","timestamp":1756336082000},"score":1,"resource":{"primary":{"URL":"https:\/\/journals.humankinetics.com\/view\/journals\/pes\/28\/2\/article-p321.xml"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2016,5]]},"references-count":0,"journal-issue":{"issue":"2"},"URL":"https:\/\/doi.org\/10.1123\/pes.2015-0212","relation":{},"ISSN":["0899-8493","1543-2920"],"issn-type":[{"type":"print","value":"0899-8493"},{"type":"electronic","value":"1543-2920"}],"subject":[],"published":{"date-parts":[[2016,5]]}}}