In a lot of mediterranean countries an afternoon nap or a siesta has been part of the culture; also in many south-american countries a sleeping break during the day is the accepted norm. Until recently there had not been conclusive proof that it was beneficial, and it was also suggested that it may interfere with night-time sleeping.

But a recent comprehensive study by Harvard School of Public Health Dimitrios Trichopoulos (Feb.2007) has shown that significant health benefits can be gained by a nap(3 times a week of 30 mins or more), this news may affect workplace habits worldwide.

Read more how naps help you live longer

Further info on how sleeping is beneficial to heart health