article 2016 Time of Day and Training Status Both Impact the Efficacy of Caffeine for Short Duration Cycling Performance James C. Boyett, Gabrielle E. W. Giersch, Christopher J. Womack, Michael J. Saunders, Christine A. Hughey, Hannah M. Daley, Nicholas D. Luden JournalNutrientsDOI10.3390/nu8100639Populationmale cyclists View on DOI ↗