Relationships between isokinetic knee strength, single-sprint performance, and repeated-sprint ability in football players

Mark A Newman, Kyle M Tarpenning, Francesco Marino

Research output: Contribution to journalArticlepeer-review

93 Citations (Scopus)

Abstract

Previous research has demonstrated that muscular strength of the knee extensors is related to the speed an athlete can produce during a single-sprint performance. Football players, as well as many other athletes on the field and the court, execute multiple sprints during the course of a match. The purpose of this study was to examine the relationships between leg strength, single-sprint speed, and repeated-sprint ability. Thirty-eight football players from 3 codes (soccer, rugby league, rugby union) completed a 12- x 20- m repeated-sprint protocol and were evaluated for peak isokinetic knee extension and flexion torque at 608[middle dot]s-1, 1508[middle dot]s-1, and 2408[middle dot]s-1. Although single-sprint performance correlated with peak extensor and flexor torque at all velocities, the strongest correlation was observed between relative knee extensor torque at 2408[middle dot]s-1 and the initial acceleration phase (0-10 m) of the single-sprint performance (r 520.714, p < 0.01). However, the data suggest that factors other than strength contribute to repeated-sprint ability. This finding provides new evidence in elucidating the relationship between strength and repeated-sprint performance.
Original languageEnglish
Pages (from-to)867-872
Number of pages6
JournalJournal of Strength and Conditioning Research
Volume18
Issue number4
Publication statusPublished - 2004

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