decent ones a must. when i started out running a few years ago i just got some asics from sports direct, about £40 as wasn't sure i would keep it up. This time went to a specialist shop and went on a treadmill and they film your feet as you run. I told them didn't want to spend more than £80 so they gave me a pair of asics that where £100 for £85, so they will negotiate. Trainers are so ugly but so worth it as not had an injury since wearing them