I use these shoes to workout and they are very flexible - enough cushion and support for sprint workouts and plyometrics, stable enough for heavy leg days (Squats/ Deadlifts/ Etc.) and light enough that they almost feel as if I am not wearing any shoes at all. Not sure if I would run long distances in them, but at 6'4 225 they have held up extremely well to varied daily workouts. After 3 months they are still going strong.