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Randomised controlled trial examines exercise and caffeine effects on cycle ergometer test accuracy, suggesting exercise impacts more than caffeine.
Caffeine did not affect the accuracy of the VO₂max estimation from the EB-test. However, strenuous exercise before testing increased estimation errors, suggesting that recent intense exercise has a greater impact on EB-test validity than moderate caffeine consumption.
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Björkman et al. (2026) studied this question.
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