Weight gain in teens may be linked to late nights, says study

US research reveals teenagers’ body mass index increasing with every hour they stay up during the school week

Sleep – the eight-hour live-broadcast lullaby for a frenetic world

Max Richter’s eight-hour composition has broken records, and it turns out to be as eye-opening as it is soporific

Narcolepsy cases linked to flu vaccine subject to new compensation dispute

Lawyers dispute claims over Pandemrix swine flu vaccine which was withdrawn after doctors noticed rise in narcolepsy cases

Why should teenagers be allowed to sleep in for as long as it suits them?

Apparently, it suits their circadian rhythms to start school later. Of course it does – I would rather wake up at lunchtime, too. But that’s not how the world works

Keep the dream alive: why waking up later is good for us all

Dr Paul Kelley says children are losing 10 hours of sleep a week – and it’s all down to a clash between school start times and teenage body clocks

A stroll by the sea will help you sleep longer, study finds

Research for the National Trust also revealed coastal walkers reflected more about their loved ones and their childhood

Teens’ night-time use of social media ‘risks harming mental health’

Researcher says ‘digital sunset’ might improve sleep quality as separate study shows girls turn to social media when they’re anxious

Why you should start work at 10am (unless you’re in your 50s)

We shouldn’t make everyone come in at 9am just because it suits the boss’s sleeping patterns. It’s time to stagger starting times and let 30-somethings come in later, says one leading sleep scientist

Spotify data reveals boom in sleep and relaxation albums

Music streamers craving some shuteye are spoiled for choice, with 282 albums released in the last week alone – and Ed Sheeran a popular aid for snoozing

Sleep shortage increases susceptibility to catching a cold, study finds

Tests on men and women reveal those who sleep six hours or less a night are more than four times as likely to contract virus than those resting for seven or more hours