James and Anna speak to Jane Rumble from UK Anti-Doping and TeamGB cyclist Josie Knight, before competing in their own race around a velodrome. 

Thanks to Herne Hill Velodrome and TeamGB for their assistance in making this show.

This episode was presented by Anna Ptaszynski and James Harkin 

Contributions from Josie Knight, Jane Rumble and Thea Smith

Produced by Molly Windust and James Harkin

Sound recording and outdoor editing by Adrian Bradley

Studio editing by James Harkin

Graphic design and sound design by Alex Bell

Sound engineering by Ethan Ruparelia 

Production Assistance by Natascha McQueen and Tara Dorrell 

And for more sporting stories and curiosities, James and Anna's book, A Load of Old Balls is out now.

This was a QI Ltd Production.