Caffeine and Performance over Consecutive Days of Simulated Competition. Med. Sci. Sports Exerc., Vol. 46, No. 9, pp. 1787–1796, 2014. Purpose: Performance improvements after caffeine (CAF) ingestion are well documented when using a 1-d protocol. In numerous competitions such as the Tour de France, Tour de Ski, world championships, and National College Athletic Association championships, athletes compete for several days in a row. To date, no studies have investigated the effects of CAF when competing for consecutive days in a row. This study aimed to investigate the effects of placebo (PLA) and two different CAF doses (3 and 4.5 mgIkgj1 body mass) on performance in a 10-min all-out, cross-country, double poling ergometer test (C-PT) 2 d in a row. Method: Eight highly trained male cross-country skiers (V˙ O2max-run, 78.5 T 1.6 mLIkgj1 Iminj1 ) participated in the study, which was a randomized, double-blind, PLA-controlled, crossover design. Performance was assessed as distance covered during a 10-min all-out C-PT. Oral ingestion of CAF or PLA was consumed 75 min before the all-out C-PT. Results: Poling distance was improved after CAF ingestions compared with that after PLA on both days. The improvements on day 1 were 4.0% (90% confidence limits, T3.3) and 4.0%...

Stadheim, Hans Kristian; Spencer, Matthew; Olsen, Raymond; Jensen, Jørgen
Medicine & Science in Sports & Exercise American College of Sports Medicine, Medicine & Science in Sports & Exercise 46(9): 1787–1796
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