I do X-Fit twice a week. This is a combo of cardio and strength-training. I have been looking for sneakers with a flat heel and sole for weights (stability) and minor flex in the heel and sole. These are PERFECT! With lifting there is no rocking and with sled-pulls and jump rope there is just enuf flex. And they don't cost over a Hindi dollars (Yaay!). $79 is cheap as I usta have $100 weight lifting shoes plus cardio sneaks.