To me this notion that shoes like this have a spring action that are actually useful seems dubious. Prosthetic blades have a spring constant that’s clearly cali

To me this notion that shoes like this have a spring action that are actually useful seems dubious. Prosthetic blades have a spring constant that’s clearly calibrated to match the cadence of your running step. I really don’t think the little springs on these shoes could possibly have the necessary correct spring constant to be beneficial in that way. Yes they might cushion your knees and joints from the blows associated with your foot landing on pavement but that’s a different effect that saying the spring action is actually helping you run more efficiently (like prosthetic blades do).