So I was given these shoes by an awesome lady, (you know who you are) and I love them. I finally started running on them last week. You don't need a track with these puppies. They are so spongey and lovely. My knees didn't hurt, my joints didn't ache, my ankle didn't hurt, I didn't have to wear my brace. It makes your posture much better, you stand a little taller, instead of hunched over. It really makes running more of a delight and I love them.