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Participants completed five soccer-specific running courses at three different speeds three times each, while being filmed using the multi-camera system. The participant\u2019s <jats:italic>x<\/jats:italic>,<jats:italic>y<\/jats:italic> field positions were determined by the optical player tracking system and displacement was estimated using Euclidean distance, and compared with real distance. On average, the difference between actual distance and estimated displacement was 0.25% (mean absolute difference = 0.79 \u00b1 0.56m) with a slightly larger coefficient of variation during 90\u00b0 turns (4.89%) when compared with straight line running (4.09%). In addition, there were strong correlations between actual distance and measured displacement (<jats:italic>r<\/jats:italic> = 0.986 \u2013 0.988). Collectively, the typical error (0.25 \u2013 0.36 m), typical error as a coefficient of variation (1.06 \u2013 1.75%) and intraclass correlation coefficient (0.88 \u2013 0.93) showed high levels of intra-operator reliability. The optical player tracking system provides accurate and reliable estimates of displacement of players on a soccer field. This system provides non-invasive position detections for players and opposition players during soccer matches.<\/jats:p>","DOI":"10.1515\/ijcss-2017-0013","type":"journal-article","created":{"date-parts":[[2018,1,6]],"date-time":"2018-01-06T22:16:12Z","timestamp":1515276972000},"page":"175-184","source":"Crossref","is-referenced-by-count":11,"title":["The Accuracy and Reliability of a New Optical Player Tracking System for Measuring Displacement of Soccer Players"],"prefix":"10.1515","volume":"16","author":[{"given":"J.","family":"Mara","sequence":"first","affiliation":[{"name":"Research Institute for Sport and Exercise , University of Canberra"}]},{"given":"S.","family":"Morgan","sequence":"additional","affiliation":[{"name":"College of Science Health and Engineering , La Trobe University"}]},{"given":"K.","family":"Pumpa","sequence":"additional","affiliation":[{"name":"Research Institute for Sport and Exercise , University of Canberra"}]},{"given":"K.","family":"Thompson","sequence":"additional","affiliation":[{"name":"Research Institute for Sport and Exercise , University of Canberra"}]}],"member":"374","published-online":{"date-parts":[[2017,12,29]]},"reference":[{"key":"2021040711080916913_j_ijcss-2017-0013_ref_001_w2aab3b7b1b1b6b1ab1ab1Aa","doi-asserted-by":"crossref","unstructured":"Andersson, H., Randers, M., Heiner-Moller, A., Krustrup, P., & Mohr, M. 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