How much can an extra hour's sleep change you?, article.
So the clear message from this experiment was that if you are getting less than seven hours' sleep a night and can alter your sleep habits, even just a little bit, it could make you healthier. "Have a lie-in, it will do you good" - that's the kind of health message that doesn't come along very often.
No, it really doesn't, does it?
By funny coincidence, I had just quoted on Domai.com:
[Sleep is] the golden chain that ties health and our bodies together. -- Thomas Dekker
I noticed when I was young that when I got my sleep full and regularly, I almost never got sick. And when I didn't, I did get sick, sure as winter after autumn.