When are we at our deepest sleep?

When are we at our deepest sleep?

Chris Idzikowski (Director of the Edinburgh Sleep Centre) gives expert video advice on: What is deep sleep?; When are we at our deepest sleep?; If we are unconscious when we sleep, how do we wake up? and more...

Your deep sleep usually occurs in the first three hours. So over the two, one and a half hour cycles, there is a lot of deep sleep, then you awaken just that tiny bit and then go back and get a second block of deep sleep.