Monk 2005

Research paper

Monk TH. The post-lunch dip in performance. Clin Sports Med. 2005 Apr;24(2):e15-23. doi:10.1016/j.csm.2004.12.002. PMID: 15892914.

Why we cite it

Review arguing that the post-lunch dip is ”a real phenomenon that can occur even when the individual has had no lunch and is unaware of the time of day”, with ”its roots in human biology”, rather than simply a consequence of eating lunch. The dip ”may be linked to the size of the 12-hour harmonic in the circadian system” and is ”certainly exacerbated by a high-carbohydrate lunch”. The review does not discuss eating decisions.

About the author

Timothy H. Monk, PhD, DSc, is Professor of Psychiatry at the University of Pittsburgh School of Medicine and Director of the Human Chronobiology Research Program at Western Psychiatric Institute and Clinic. BA (1971) and PhD (1974) from the University of Nottingham, England. Co-developed the Pittsburgh Sleep Quality Index (PSQI); conducted sleep experiments aboard Space Shuttle Columbia and Space Station Mir; author of six books on circadian rhythms, sleep timing, shift work, jet lag, and performance.