Research appearing in the February 12, 2007 issue of the Archives of Internal Medicine (2007;167:296-301) found that napping regularly decreased the risk for heart attacks. The researchers followed over 23,000 Greeks over approximately six years. The subjects had no history of coronary problems, stroke or cancer. Those who took regular naps (at least 30 minutes, three times each week) had a 37% lower risk of having a fatal heart attack. The researchers noted that the cardio protective effect of napping was even more pronounced for working men.