title: The effects of warm-up on intermittent sprint performance in a hot and humid environment.
abstract: It is unknown whether a passive warm-up or an active warm-up performed at an intensity based on lactate thresholds could improve prolonged intermittent-sprint performance either in thermoneutral or hot environmental conditions. To investigate this issue, 11 male athletes performed three trials that consisted of 80 min of intermittent-sprinting performed on a cycle ergometer, preceded by either an active or a passive warm-up. Active warm-up and intermittent-sprint performance were performed in both hot and thermoneutral environmental conditions, while passive warm-up and intermittent-sprint performance were performed in hot conditions only. First sprint performance was also assessed. Results showed no significant interaction effects between any of the trials for total work (J · kg(-1)), work decrement, and power decrement (P = 0.10, P = 0.42, P = 0.10, respectively). While there were no significant differences between trials for work done for first sprint performance (P = 0.22), peak power was significantly higher after passive warm-up compared with active warm-up performed in either thermoneutral (P = 0.03) or in hot conditions (P = 0.02). Results suggest that the main benefits of warm-up for first sprint performance are derived from temperature-related effects. Active warm-up did not impair prolonged intermittent-sprint performance in the heat compared with thermoneutral conditions.
authors.affiliation: School of Human Movement and Exercise Science, The University of Western Australia, Crawley, WA, Australia.
authors.forename: Pongson
authors.initials: P
authors.lastname: Yaicharoen
authors.forename: Karen
authors.initials: K
authors.lastname: Wallman
authors.forename: Alan
authors.initials: A
authors.lastname: Morton
authors.forename: David
authors.initials: D
authors.lastname: Bishop
authors.forename: Robert J
authors.initials: RJ
authors.lastname: Grove
mesh_terms: D000293:Adolescent; D000328:Adult; D054874:Athletic Performance / Q000502:physiology*; D001642:Bicycling / Q000502:physiology*; D001831:Body Temperature / Q000502:physiology; D015444:Exercise / Q000502:physiology*; D005080:Exercise Test; D006339:Heart Rate / Q000502:physiology; D006358:Hot Temperature; D006801:Humans; D006813:Humidity; D019344:Lactic Acid / Q000097:blood; D008297:Male; D010101:Oxygen Consumption / Q000502:physiology; D055815:Young Adult
chemical_list: D019344:Lactic Acid