Keyword being; unplanned., so planned naps are a-ok.

clipped from www.reuters.com Daytime dozing may be warning sign of stroke CHICAGO (Reuters) - Older people who have significant trouble staying awake during the day have more than four times the normal risk of having a stroke, U.S. researchers said on Thursday. They also found a higher risk of heart attacks and other cardiovascular problems in seniors who regularly nod off during the day without planning to. "Even when we controlled for things like hypertension, diabetes, physical activity, obesity and socioeconomic status, we found that people who had significant daytime dozing were much more likely to end up with stroke," the risk of stroke was 2.6 times greater for those classified as doing "some dozing" during the day compared to those with "no dozing." Those in the "significant dozing" group had a 4.5 times greater risk. people with sleep apnea who briefly stop breathing throughout the night are at high risk of stroke. This can cause daytime sleepiness.