Summary
The purpose of this study was to investigate if caffeine ingestion improves 5-km time-trial performance in well-trained and recreational runners. Using a double-blind
placebo-controlled design, 15 well-trained and 15 recreational runners completed two
randomized 5-km time-trials, after ingestion of either 5 mg kg−1 of caffeine or a placebo. Caffeine ingestion significantly improved 5-km running performance in both the well-trained and recreational runners. In comparison
to the placebo trial, the caffeine trial resulted in 1.1% (90% CI 0.4–1.6) and 1.0%
(0.2–2%) faster times for the well-trained and recreational runners. Reliability testing
of the recreational runners indicated a test–retest error of measurement of 1.4%.
We conclude that caffeine ingestion is likely to produce small but significant gains
in 5-km running performance for both well-trained and recreational runners.
Keywords
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Article info
Publication history
Accepted:
December 15,
2006
Received in revised form:
December 14,
2006
Received:
July 30,
2006
Identification
Copyright
© 2007 Sports Medicine Australia. Published by Elsevier Inc. All rights reserved.
