“That includes weekends, I’m afraid.
“Because the weekend lay-in tends to disrupt sleep and leads to something called social jet lag which is like real jet lag.”
Although getting that extra hour in bed on a weekend morning might be a ritual for many, the expert warned it can lead to a vicious cycle.
Dr Mosley explained: “For example, if you get up two hours later on Sunday morning that means you will have less sleep drive come Sunday evening.
Source: | This article first appeared on Express.co.uk