Researchers at the Walter Reed Army Institute of Research have found that caffeine, administered in two daily 200 mg doses, was only able to improve improved alertness or performance following sleep deprivation for two days, with a sharp drop off in effect over the next three days following continued sleep deprivation. Participants in the study were restricted to sleeping only five hours per night. The researchers found that there was no longer improved alertness or performance after three nights. According to research scientist and lead author Tracy Jill Doty, PhD: “The data from this study suggests that the same effective daily dose of caffeine is not sufficient to prevent performance decline over multiple days of restricted sleep.” The research findings were presented at Sleep 2016, the 30th anniversary meeting of the Associated Professional Sleep Societies LLC (APSS).
Author: Tanja Schmitz
Founder and Editor of Fitness Magazine. You’ll find her behind her computer or on her bike, dreaming up new ways to improve or create content for you.