Why are Olympic athletes turning to cupping?
We thought it was a Hollywood fad but now Olympians have taken to a strange alternative therapy...
You might have noticed circular bruises on some of the athletes - and it's because they've been using cupping as a means to try and enhance their health and performance.
The practice involves placing heated cups on the skin to create suction and the tell-tale marks have been seen on stars such as Gwyneth Paltrow and Jennifer Aniston.
But what effect is cupping supposed to have exactly? Former Olympic sprinter Iwan Thomas sheds some light.
You might also be interested in: