The Metabolic And Performance Effects Of Caffeine Compared To Coffee During Exercise

1) To investigate the metabolic effects of caffeine and coffee during moderate intensity exercise. 2) To compare the performance enhancing effects of caffeine and coffee. In a single-blind, crossover study design, eight trained male cyclists/triathletes (Mean + or - SD: Age 36+ or -6y, Height 1.80+...

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Bibliographic Details
Published in:Medicine and science in sports and exercise 2012-05, Vol.44 (5S), p.720-720
Main Authors: Randell, Rebecca, Hodgson, Adrian B, Jeukendrup, Asker E
Format: Article
Language:English
Online Access:Get full text
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Summary:1) To investigate the metabolic effects of caffeine and coffee during moderate intensity exercise. 2) To compare the performance enhancing effects of caffeine and coffee. In a single-blind, crossover study design, eight trained male cyclists/triathletes (Mean + or - SD: Age 36+ or -6y, Height 1.80+ or -0.04m, Weight 76.3+ or -7.2kg, VO sub(2) max 56.1+ or -6.9 ml/kg/min) completed 30 min of steady-state (SS) cycling at approximately 55% VO sub(2)max followed by a time trial (TT) lasting approximately 45 min. One hour prior to exercise each athlete consumed drinks consisting of either caffeine (5mg/kg), instant coffee (5mg/kg), instant decaf coffee or placebo. The set workloads produced similar relative exercise intensities during the SS of 54.6%+ or -0.7%, 55.4%+ or -2.4%, 54.7%+ or -2.7%, 55.0%+ or -2.0% VO sub(2) max for caffeine, coffee, decaf and placebo respectively. Performance times during the TT were significantly faster (~4.0%) for both caffeine and coffee when compared to placebo and decaf (39.51+ or -2.70, 39.40+ or -2.48, 41.38+ or -1.10, 40.31+ or -1.31 min respectively, p
ISSN:0195-9131