Simone Biles’ twisties: mental block which puts gymnasts at serious risk

The star of the US team has been struggling with a dangerous condition where gymnasts lose their sense of spacial awareness

Simone Biles almost never misses her Amanar vault. There are numerous times when she has peeled off during uneven-bar routines, when her landings on floor have contained steps the size of canyons and, certainly, when she has wanted to take a saw to the balance beam and split it in half. But the Amanar, as dangerous and difficult as it is, always has been one of her most trusty skills.

So when she completely lost her way in the middle of its two and a half twists during the women's team final at the Tokyo Games, it was clear something beyond the ordinary was wrong.