The Archives of Internal Medicine recently published results from a Harvard School of Public Health and University of Athens Medical School joint study regarding the potential benefits of napping.
Researchers followed 23,000 Greek adults over six years and measured their diet, physical activity, and whether they napped
(a) never
(b) occasionally - defined as 1-2x/week for less than 30 minutes (usually on weekends), OR
(c) frequently - defined as 3 or more times per week for 30 minutes or more.