Fans at the Olympics are trying out a new AI-powered talent spotting system that hopes to find the gold medallists of the future. Its developers aim to use a portable version of the technology to bring advanced sport science to remote areas around the world.

As the alarm sounds, Tacto races frantically to swipe the infra-red sensors in front of him as some of them suddenly flash blue.

Not far away his younger brother, Tomo, sprints down a short running track as his motion is tracked by a series of cameras.

The seven and four-year-old siblings from Yokohama, Japan, are taking part in a…