Want to lose weight? How much can you achieve through exercise? Dan Saladino investigates with the help of Mike Keen, a chef and Arctic explorer.

Mike has had numerous adventures in Greenland, including kayaking thousands of miles, and sometimes doing nothing at all. What happened to his weight on this trips has left him puzzled.

They enlist the help three experts, Chris Van Tulleken, author of Ultra Processed People; Nigel Smith of the UK Sports Institute and Andrew Jenkinson, surgeon and author of Why We Eat too Much and How to Eat.

Produced and presented by Dan Saladino.