The power of naps

Apparently 'It’s time to start taking midday naps as a new study has revealed that it can lower blood pressure levels and decrease the number of required anti-hypertensive medications', according to a study which:

included 386 middle aged patients with arterial hypertension. The following measurements were performed in all patients: midday sleep time, office BP, 24 hour ambulatory BP, pulse wave velocity, two lifestyle habits, body mass index (BMI) and a complete echo-cardiographic evaluation, including left atrial size. Just an half hour nap during the day has multiple benefits.

Maybe. But, on the other hand, perhaps the people who were relaxed enough to take a nap in the middle of the day and had enough control over their lives to schedule a siesta started off with lower blood pressure than people who were too stressed to switch off and snooze through lunchtime, possibly because they lived lives without the autonomy to take a break at a time of their own choosing.

When it comes to power naps, it might be the power, not than the napping, that matters.