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
heelstriker, due to the shoe's stability and cushioning.Contact 0161 419 2500; www.adidas.com/ukAsics Gel Verdict DS – £65Weight 289gThe shoe The Verdict DS is a gem. It's a basic shoe with Gel in the rearfoot and a single density midsole, but it does have a
