're great for speed sessions, short races, steady runs and even marathon racing. In fact, find the right pair of performance trainers and you might just have found the running shoe for all occasions. Here are eight of the best.Adidas Climacool Rotterdam
in adidas's Rotterdam Climacool, swap to the Supernova Competition and your marathon time could drop by up to 39 seconds.Asics Gel DS Racer – £75Weight 252gMost pure racing shoes are stripped of cushioning, support and technology. Not the Gel DS Racer
