Hi I have been doing stronglifts for 3 weeks and have been using my new balance running shoes that I know are inappropriate. Could anyone point me in the right direction for a training shoe that I could also finish my stronglift days off with a bit of cardio on the treadmill? I also do Zumba classes a couple of times a week and really can't afford different footwear for every thing I do. I'm in the uk. Thanks in advance.