Finnish teenagers with sleeping disorders double in last 20 years

Study reveals increase in insomnia and experts believe energy drinks and smartphones may be to blame

‘I felt as if I had become fear itself’: life after a stroke at 34

Film-maker Lotje Sodderland was 34 when she had a severe stroke, losing the ability to speak, read, write or think coherently. Could she learn to live – and love – with a broken brain?

Chocolate kills, loser! When health-tracking gadgets go bad

In a world of wearable tech, will smartwatches have the last laugh? GP and the Bad Doctor graphic novelist Ian Williams looks into the future in this exclusive comic strip

Nintendo to expand fitness focus beyond games to sleep-tracking

Games firm reveals plans for launch by early 2016, after Super Smash Bros helped it return to profitability. By Stuart Dredge

Don’t judge Robbie Williams for live-tweeting his little angel’s birth

Ally Fogg: There’s an awful lot of hanging around involved in childbirth, and Ayda Field didn’t seem to mind, so what’s the problem?

By removing photos of childbirth, Facebook is censoring powerful female images

Milli Hill: Birth is a fundamental feminist issue right now - women’s bodies should not be sanitised. Facebook should let us see it as it is

Wisdom2.0: it came for our heartbeats, now Google wants our souls

Tech companies are embracing mindfulness to help staff deal with stress - and help seize back control from the gadgets that have taken over our lives. By Carole Cadwalladr

Apple Watch has designs on health industry – but is it good for doctors?

The new Apple Watch comes with health apps and has an NHS partner – but will the right patients benefit? By Sarah Boseley and Alex Hern

Mapping our lives: the importance of lifelong health studies

Frankie Mullin: Longitudinal health studies follow subjects from ‘womb to tomb’ to create a fingerprint of a healthy human. And there is one thing that has a huge impact on our wellbeing

‘Sleep trackers made me far more interested in my sleep’

Motion-sensing sleep monitors vary in comfort and accuracy, with a few annoying habits for bed fellows, our writer finds