W hen the much-hyped Nike Mind shoes were released in January, I bought a pair. I was grabbed by the idea that the orange nodules on the sole could , supposedly, focus the mind. The futuristic look of the shoe also appeals. If walking on knobbly things took a bit of getting used to, it was worth it – if only for that irresistible fashion smugness of having something rare. In the last week, I have been stopped in the street and asked where I got the shoes. It turns out they are now out of stock and have sold for over £300 on resale site Goat. The Mind is part of a wider trend in “exercise slides”, a pre-game shoe designed to ground you ahead of your chosen activity. Nike claim that the 22 nodules on the sole stimulate the mechanoreceptors on your feet, engaging the sensory area of your brain, meaning focus is heightened. Meanwhile, recovery slides made by brands such as Hoka and Oofos use cushioned soles and a shape that cradles the foot to helpfight foot fatigue after a lot of exercise.…