Exercise: which regimes are worth the pain?

From HIIT to pilates, swimming, running, ultramarathons and crossfit, there are scores of ways to get fit. But which will really make a difference?

Wearable tech for Christmas? It probably won’t help you get fit

To help improve users’ health and fitness, wearable gadgets need to be re-designed towards influencing behaviours

The history of feminine hygiene products is far from peachy

Liz Cookman: the announcement of a probiotic supplement that would make vaginas smell like peaches was erroneous, but there’s a long history of companies using science to sell unnecessary vag-products

Text neck: how smartphones are damaging our spines

Homa Khaleeli: Constantly looking down at an angle places enormous strain on the spine and can result in permanent harm, according to a new report

Sweet Peach won’t make vaginas smell like fruit or taste of Diet Coke

Probiotic supplement Sweet Peach will analyse micro-organisms and has nothing to do with peach, roses or soft drinks – or the men who introduced it

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?