[Psycho_Bunny]

No.  It doesn't.  If you're letting your health go to a condition serious enough to adversely affect you, 11 days out of 365 will not make or break your condition.

Exercising 11 days a year will not keep you from getting fat: exercising all year does.  Brushing your teeth 11 days a year does not prevent cavities.  Eating healthy 11 days doesn't prevent plaque build up in your arteries nor hold off conditions like Type 2 diabetes....etc, etc.

If you can find any empirical evidence to the contrary, I'd love to see it.

[A. Pole]

No. It doesn't. If you're letting your health go to a condition serious enough to adversely affect you, 11 days out of 365 will not make or break your condition.

Oh, it does. It makes a big difference in stress for me and most of people whom I ask if you have two or four weeks of vacation. I noticed that those who answer otherwise, display some neurotic oppressive symptoms.

With four weeks you can have a real break.