BBC Trending: Quadrobic panic in Russia over craze to dress and walk on all fours like animals

There’s a moral panic in Russia and several former Soviet states about a craze in which teenagers and children dress up as animals and walk on all fours like their favourite animals. In one TikTok video, a group of youngsters are seen scampering across Moscow’s Red Square wearing fox masks and tails. Politicians and religious leaders have warned the trend is a threat to civilised values and a cover for LGBT and western ideology. Legislation is now being considered to ban quadrobics and fine or arrest parents of enthusiasts. But quadrobics has a longer history as a form of exercise. We speak to the pioneering Japanese athlete who holds the world record for covering 100m on all fours in 15.7 seconds, which he set in 2015.