BBC Sport - Kristof Willerton: World champion tumbler is biochemistry student

Scientist is world's best tumbler

BBC Points West meets Kristof Willerton, a biochemistry student turned world champion tumbler.

Tumbling is a gymnastic discipline that involves sprinting and somersaulting down a track.

Gloucester's Willerton, 20, has been competing in the sport since he was 10 years old and is a four-time national champion.

Last month, the Oxford student became the first British man to claim tumbling gold at the trampoline gymnastics world championships in Sofia.