Dose response of caffeine on 2000-m rowing performance

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Title Dose response of caffeine on 2000-m rowing performance
Author Skinner, Tina L.; Jenkins, David G.; Coombes, Jeff S.; Taaffe, Dennis R.; Leveritt, Michael
Journal Name Medicine and Science in Sports and Exercise
Year Published 2010
Place of publication United States
Publisher Lippincott Williams & Wilkins
Abstract Purpose: To determine whether a dose-response relationship exists between caffeine and 2000-m rowing performance. Methods: In this randomized, placebo-controlled, double-blind crossover study, 10 competitive male rowers (mean ± SD: age = 20.6 ± 1.4 yr, body mass = 87.7 ± 10.5 kg, height = 186.8 ± 6.8 cm, V·O2peak = 5.1 ± 0.6 L·min-1) consumed 2, 4, or 6 mg·kg-1 caffeine or a placebo 60 min before completing a 2000-m time trial on a rowing ergometer. The trials were preceded by a 24-h standardized diet (including a light preexercise meal of 2 g·kg-1 CHO), and subjects were tested preexercise for hydration, caffeine abstinence, and blood glucose concentrations. Results: Time trial performance was not significantly different across the three caffeine doses or placebo (P = 0.249). After the three caffeine trials, postexercise plasma glucose and lactate concentrations were higher compared with the placebo trial (P < 0.05). Plasma caffeine concentrations after 60 min of ingestion were lower than the values reported previously by others following the same dose, and there was considerable interindividual variation in plasma caffeine concentrations in response to the various caffeine doses. Conclusions: The large interindividual response to the caffeine doses suggests that individual characteristics need to be considered when administering caffeine for performance enhancement. In addition, preexercise feeding may significantly affect plasma caffeine concentrations and the potential for caffeine to improve performance.
Peer Reviewed Yes
Published Yes
Alternative URI http://dx.doi.org/10.1249/MSS.0b013e3181b6668b
Volume 42
Issue Number 3
Page from 571
Page to 576
ISSN 0195-9131
Date Accessioned 2010-06-25
Language en_AU
Research Centre Griffith Health Institute
Faculty Griffith Health Faculty
Subject Clinical and Sports Nutrition
URI http://hdl.handle.net/10072/32241
Publication Type Journal Articles (Refereed Article)
Publication Type Code c1

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