I work out a lot and am rough on my feet. I am currently doing the Insanity workout which is VERY high impact. My feet have been hurting in the shoes I was using. However I just bought the Voltaic 2's and my workouts have been SO much better. My feet never hurt and feel so cushioned at every pressure point. I LOVE them! Also, I had heard PUMA's ran small but I purchased them in my normal size and they fit perfectly. I would definitely recommend these shoes.