{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,29]],"date-time":"2026-10-29T17:35:27Z","timestamp":1793295327154,"version":"4.5.0"},"reference-count":46,"publisher":"Human Kinetics","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2026]]},"abstract":"<jats:p>\n                    <jats:bold>\n                      <jats:italic>Purpose<\/jats:italic>\n                    <\/jats:bold>\n                    <jats:italic>:<\/jats:italic>\n                    To develop and evaluate the reliability, construct validity, and sensitivity of 2 field-based goalkeeper-specific tests designed to quantify movement performance (goalkeeper-specific movement [GSM]) and reactive agility (goalkeeper-specific agility [GSA]), alongside derived reaction-time indices in youth soccer goalkeepers.\n                    <jats:bold>\n                      <jats:italic>Methods<\/jats:italic>\n                    <\/jats:bold>\n                    <jats:italic>:<\/jats:italic>\n                    Fifty-eight goalkeepers (12\u201319 y) completed a standardized test battery (countermovement jump, 5- to 20-m linear sprints, V-cut change-of-direction, GSM, and GSA) on 2 occasions separated by 7 days. Absolute reliability was assessed using the coefficient of variation (CV) and standard error of measurement, relative reliability using intraclass correlation coefficients (ICC; 95% CIs), and sensitivity by comparing standard error of measurement with the smallest worthwhile change. Construct validity was examined through Pearson correlations with established performance tests and known-groups comparisons across age categories.\n                    <jats:bold>\n                      <jats:italic>Results<\/jats:italic>\n                    <\/jats:bold>\n                    <jats:italic>:<\/jats:italic>\n                    Linear sprint and V-cut outcomes showed acceptable-to-good reliability (CV \u226410%; ICC: .70\u2013.93). For the goalkeeper-specific tests, total-time outcomes demonstrated acceptable reliability and sensitivity across age categories (GSM: CV 4.2%\u20137.0%, ICC: .75\u2013.85; GSA: CV 4.2%\u20136.0%, ICC: .50\u2013.79), whereas side-specific measures and reaction-time indices were less consistent. GSM and GSA total times were strongly interrelated (\n                    <jats:italic>r<\/jats:italic>\n                    \u2009=\u2009.71\u2013.82) and moderately-to-strongly associated with sprint and change-of-direction performance, and differed by age group, with generally lower times in older goalkeepers.\n                    <jats:bold>\n                      <jats:italic>Conclusion<\/jats:italic>\n                    <\/jats:bold>\n                    <jats:italic>:<\/jats:italic>\n                    GSM and GSA total-time outcomes offer goalkeeper coaches and practitioners practical, age-sensitive field-based tools to profile, monitor, and guide goalkeeper-specific movement and reactive agility training. In contrast, reaction-time indices derived from difference scores show limited consistency and are not recommended for monitoring.\n                  <\/jats:p>","DOI":"10.1123\/ijspp.2026-0040","type":"journal-article","created":{"date-parts":[[2026,9,30]],"date-time":"2026-09-30T03:46:37Z","timestamp":1790739997000},"page":"1-14","source":"Crossref","is-referenced-by-count":0,"title":["Reliability, Construct Validity, and Sensitivity of Goalkeeper-Specific Movement and Reactive Agility Tests in Youth Soccer Goalkeepers"],"prefix":"10.1123","author":[{"ORCID":"https:\/\/orcid.org\/0009-0003-8049-5591","authenticated-orcid":true,"given":"Pablo","family":"Gonz\u00e1lez-Jarr\u00edn","sequence":"first","affiliation":[{"name":"Department of Physical Education and Sport, Faculty of Physical Activity and Sport Sciences, Universidad de Le\u00f3n, Le\u00f3n, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8127-5393","authenticated-orcid":true,"given":"Jos\u00e9 Vicente","family":"Garc\u00eda-Tormo","sequence":"additional","affiliation":[{"name":"Department of Physical Education and Sport, Faculty of Physical Activity and Sport Sciences, Universidad de Le\u00f3n, Le\u00f3n, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5284-303X","authenticated-orcid":true,"given":"Jaime","family":"Fern\u00e1ndez-Fern\u00e1ndez","sequence":"additional","affiliation":[{"name":"Department of Physical Education and Sport, Faculty of Physical Activity and Sport Sciences, Universidad de Le\u00f3n, Le\u00f3n, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"100","reference":[{"issue":"12","key":"r1","series-title":"PLoS One","doi-asserted-by":"publisher","first-page":"e0277683","DOI":"10.1371\/journal.pone.0277683","article-title":"Effects of speed, agility and quickness training programme on cognitive and physical performance in preadolescent soccer players","volume":"17","author":"Trecroci A","year":"2022","unstructured":"Trecroci A, Cavaggioni L, Rossi A, et al. 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