BBC Sport - Danni Khan: Speed skater to cyclist

Danni Khan: Speed skater to cyclist

Meet Danni Khan, the former speed skater competing at the Track Cycling World Cup this weekend in Glasgow.

And she's not on her own when it comes to swapping sports - we take a look at some of the other athletes who have retrained to compete in something different.

WATCH: Live coverage of the track cycling world cup from 1900 on Friday 4 November.