Ahhh, lie ins. Those blissful extra hours in bed when you’ve turned off your alarm, pulled the black-out blind down and told your partner that you will actually destroy them if they get up and make a green juice in the Nutribullet and then do an Insanity Fitness DVD at 7am on a Sunday. A SUNDAY. Do not even think about it, you tell them with your serious face on.
Lie ins can make you feel rested, rejuvenated, and like you’ve lost all feeling in your left arm because you’ve been sleeping on it funny for the past 13 hours. You don’t care that you’ve wasted half the day, that you’ve missed The Archers omnibus on Radio 4 (just me?) or that Tesco is now closed and you only have a jar of capers in the fridge – you are no longer sleep deprived!
But wait, before you hit ‘snooze’ know this: a study in this month’s Journal of Clinical Endocrinology and Metabolism (JCEM) links sleeping for longer than normal at the weekend with an increased risk of diabetes and heart disease. OK, so if you are up at the crack of dawn Monday through to Friday and then set your alarm for a lackadaisical 11.30am on Saturday you could be heading for social jet lag, meaning you feel out of step with your daily routine (and according to the Daily Mail, this is one of the many things that could potentially lead to EARLY DEATH).
Dramatically switching up the amount of sleep you get messes with your circadian rhythms and makes you tired during the day. According to the study of 447 people (monitored with a wrist accelerometer for a week) it also increases levels of triglycerides and lowers levels of the “good” type of cholesterol. And if that’s not bad enough you are also at risk of weight gain.
Previous sleep studies (yaaaawn!) show that if you accumulate a five-hour sleep debt during the week - a typical amount - then you only need one and a half hours of extra sleep on your days off to make up for it. So the conclusion is, have a lie in just be sure you do actually wake up. Or the Daily Mail got it right.