Finally got around to joining the gym & I'm quite excited. Have a couple of pairs of running trainers but feel they are doing nowt for me support wise (knees) when I'm bouncing around to a class- today did body combat & loved it but need to sort out trainer situation. I'd like some I can order online if possible & have heard that "cross trainers" are what I need for body combat/ zumba type classes. Can you recommend any? Ya :)