title: Effect of caffeinated coffee on running speed, respiratory factors, blood lactate and perceived exertion during 1500-m treadmill running.
abstract: Using a motorized treadmill the study investigated the effects of the ingestion of 3 g of caffeinated coffee on: the time taken to run 1500 m; the selected speed with which athletes completed a 1-min 'finishing burst' at the end of a high-intensity run; and respiratory factors, perceived exertion and blood lactate levels during a high intensity 1500-m run. In all testing protocols decaffeinated coffee (3 g) was used as a placebo and a double-blind experimental design was used throughout. The participants in the study were middle distance athletes of club, county and national standard. The results showed that ingestion of caffeinated coffee: decreases the time taken to run 1500 m (P less than 0.005); increases the speed of the 'finishing burst' (P less than 0.005); and increases VO2 during the high-intensity 1500-m run (P less than 0.025). The study concluded that under these laboratory conditions, the ingestion of caffeinated coffee could enhance the performance of sustained high-intensity exercise.
authors.affiliation: Department of Sport Science, Christ Church College, Canterbury, UK.
authors.forename: J D
authors.initials: JD
authors.lastname: Wiles
authors.forename: S R
authors.initials: SR
authors.lastname: Bird
authors.forename: J
authors.initials: J
authors.lastname: Hopkins
authors.forename: M
authors.initials: M
authors.lastname: Riley
mesh_terms: D000293:Adolescent; D000328:Adult; D002110:Caffeine / Q000494:pharmacology*; D003069:Coffee; D015444:Exercise; D005080:Exercise Test; D006801:Humans; D007773:Lactates / Q000097:blood*; D008297:Male; D008451:Maximal Voluntary Ventilation / Q000187:drug effects; D010465:Perception / Q000187:drug effects*; D012119:Respiration / Q000187:drug effects*; D012420:Running
chemical_list: D003069:Coffee; D007773:Lactates; D002110:Caffeine