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Caffeine is often used to reduce sleepiness; however, research suggests that it can also cause poor sleep quality. The timing of caffeine use, amongst other factors, is likely to be important for the effects it has on sleep quality. In addition, individual differences exist in the effect of caffeine on sleep quality. This cross‐sectional study investigated the influence of the timing of caffeine consumption...
To examine the validity of a novel caffeine intake questionnaire and to examine the effects of caffeine on sleep in college students.One-week, ad libitum behavior of 50 university students (28 female, 22 male; aged 20.9±1.78years) was examined with sleep logs, wrist actigraphy, and a novel daily questionnaire assessing caffeine intake at different times of day. Saliva samples were collected for caffeine...
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