These are NOT the shoe you want if you are an intense runner or cross fitter. I bought these to replace my saucony's and within a few days my joints were back to aching. I have flat feet, which if I have poor support, start to hurt my ankles and eventually my knees. I worked out in these shoes for 5 days until my knees became too stiff to work out and I had to take a break. I love them and they're cute to run errands in, but I'll have to go back to a better sneaker for my workouts.