20 January 2026

29 minutes

Available for over a year

Welcome to What’s Up Docs?, the podcast where doctors and identical twins Chris and Xand van Tulleken cut through the confusion around every aspect of our health and wellbeing.

In this episode, Chris and Xand explore the role and impact of exercise on our bodies and mood. Is going to the gym three times a week the best way of keeping fit? Or should you spread out your activity in shorter bursts throughout the day? They also discover which one of the brothers is ‘an active couch potato’ and why you can’t out run a bad diet.

Joining them to discuss this is Dr Jo Blodgett, Senior Research Fellow at the Institute of Sport, Exercise and Health at University College London. She’s a life-course epidemiologist whose work focuses on how movement across the whole 24-hour day shapes population health.

If you want to get in touch, you can email us at whatsupdocs@bbc.co.uk or WhatsApp us on 08000 665 123.

Presenters: Drs Chris and Xand van Tulleken

Guest: Dr Jo Blodgett

Researcher: Samara Linton

Producer: Faye Lyons White

Social Media Producer: Leon Gower

Executive Producer: Rami Tzabar

Editor: Jo Rowntree

Tech Lead: Reuben Huxtable

Digital Lead: Richard Berry

Composer: Phoebe McFarlane

Sound Design: Melvin Rickarby

At the BBC:

Assistant Commissioner: Greg Smith

Commissioning Editor: Rhian Roberts

A Loftus Media production for BBC Radio 4