Fit in my 40s: can a running coach make me go faster?

The personal trainer Matt Roberts is so high-end that David Cameron was a client. He’s going to assess my running style

Fit in my 40s: who knew buying running shoes was this complicated?

I feel a complete fraud: I have been running four times and pretended to go running a further three

Was Serena Williams unrealistic to try to return so soon after giving birth?

The tennis champion has withdrawn from the Australian Open three months after having her first child. So, when is the right time to come back to sport?

Fit in my 40s: ‘‘I hate running. But I’m going to give it a go’

I just don’t like pain enough ever to have broken through its threshold

Fit in my 40s: welcome to Zuu, the animal-themed exercise regime that makes everybody look ridiculous

It’s incredibly hard and everybody else covers way more ground, whether as a sideways gorilla or a crawling bear

‘It’s part of the fun to suffer’: the people hitting the great outdoors this Christmas

Meet the river swimmers, paddleboarding Santas and others who won’t be spending Christmas on the couch

Fit in my 40s: ‘The instructor tells us that if we feel sick, we should look away from the screen’

I thought nothing could ever be as challenging as a spin class. Until I tried a virtual reality spin class

Fit in my 40s: ‘Never start thinking about ambulances during a workout class’

How long will it be before they let us leave? And will I still be able to walk?

Fit in my 40s: what my gut bacteria says about me

I’m a Village Peasant (and that’s good), says our columnist Zoe Williams

Fit in my 40s: ‘Can a sober companion help me give up drink?’

I am considering another run at sobriety this month – but what about all the social events where it’s not humanly possible to avoid drinking?