Caffeine Fails to Power You Through the Work Week

yawningDepending on coffee to wake you up each day is the wrong answer for your chronic daytime sleepiness. A new study reports that caffeine’s effect on alertness and performance dwindled after 2 days.

Participants in the study were restricted to 5 hours of sleep per night for 5 nights. Each day they were given 200 mg of caffeine at 8 a.m. and again at noon. While awake they completed hourly cognitive tests.

Results show that caffeine improved performance only for the first two days of the simulated work week.

During the last 3 days of sleep restriction, alertness and performance declined. Those in the coffee group also rated themselves to be “more annoyed” than those in the placebo group over the final days of the study.

The research was conducted by the Walter Reed Army Institute of Research. Results were presented in June at the SLEEP 2016 annual meeting in Denver.yawn

This study is a reminder that caffeine is no substitute for a good night’s sleep! The American Academy of Sleep Medicine recommends that adults should sleep 7 or more hours per night on a regular basis to promote optimal health.

Learn more about the study, “Caffeine Efficacy Across a Simulated 5-day Work Week with Sleep Restriction,” in the SLEEP 2016 abstract supplement

This blog does not provide medical advice. It is intended for general informational purposes only and does not address individual circumstances. It is not a substitute for professional medical advice, diagnosis or treatment and should not be relied on to make decisions about your health. Never ignore professional medical advice in seeking treatment because of something you have read on If you think you may have a medical emergency, immediately call your doctor or dial 911.
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