Have you ever noticed how some people bounce out of bed after just a few hours of sleep, while others can barely function ...

That’s pretty incredible, given that the average person sleeps ... families with shortened sleep cycles. Again, mice engineered with those mutations slept less, with no obvious health consequences.

Obstructive sleep apnea is when a person stops breathing five or more times ... those who had fewer than five sleep disruptions per hour, or no sleep problems; those with five to 15 disruptions ...

I'm a bath person, so it's nice to be told I can ... One thing I found reassuring is that no two nights of sleep look the same, and our bodies change their patterns as we age.