{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,1]],"date-time":"2026-09-01T08:17:46Z","timestamp":1788250666286,"version":"build-2803163510"},"reference-count":30,"publisher":"Korean Society of Exercise Rehabilitation","issue":"4","license":[{"start":{"date-parts":[[2026,8,26]],"date-time":"2026-08-26T00:00:00Z","timestamp":1787702400000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc\/3.0\/"}],"funder":[{"DOI":"10.13039\/501100002507","name":"Kangwon National University","doi-asserted-by":"publisher","id":[{"id":"10.13039\/501100002507","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["e-jer.org"],"crossmark-restriction":true},"short-container-title":["J Exerc Rehabil"],"abstract":"<jats:p>The purpose of this study is to analyze the efficiency of the high-intensi-ty exercise performances of professional players during matches. Thirty professional players competed in a total of 38 matches throughout the season. 1,558 sprint efforts were recorded and subsequently analyzed. The sprint efficiency assessment tool ensured good interrater reliability (intraclass correlation coefficient, 0.892; 95% confidence interval, 0.883\u20130.901) and the validity of the analysis was confirmed by four experts with more than 20 years of experience in football. The total distance and low-intensity running were higher during the first half than during the second half of the season (P&lt;0.01). The positions covering the greatest distances were full back and midfielder. High-intensity running (P&lt;0.05) and sprinting (P&lt;0.01) were higher during home matches than during away matches. The sprint efficiency was higher during the sec-ond half than during the first half of the season (P&lt;0.05), but the maxi-mum velocity was higher during the first half of the season (P&lt;0.01). Sprint efficiency was higher for the attack than for the defense and de-fensive transition situations (P&lt;0.05). Higher duration, distance, and maximum velocity were observed for the excellent efficiency group than for the appropriate group (P&lt;0.05). In conclusion, the findings of this study suggest that the development of effective training programs to enhance high-intensity exercise performance, such as sprinting, re-quires consideration that goes beyond simply physical speed enhance-ment to encompass situational judgment, timing, path selection, and speed regulation in an integrated way.<\/jats:p>","DOI":"10.12965\/jer.2652496.248","type":"journal-article","created":{"date-parts":[[2026,8,26]],"date-time":"2026-08-26T05:06:30Z","timestamp":1787720790000},"page":"158-166","update-policy":"https:\/\/doi.org\/10.12965\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Analysis of professional football players\u2019 sprint performance efficiency in matches"],"prefix":"10.12965","volume":"22","author":[{"given":"Jeong-Hyun","family":"Shim","sequence":"first","affiliation":[{"name":"Department of Sport Science, Kangwon National University, Chuncheon, 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