4 ms·

This is admittedly not my area of expertise, but don't all shoes do that? Unless the rubber permanently deforms, any rebound at all is returning energy.

• glenngillen 7y ago
  They do, with possible the exception of Vibram Fingers, Lunas, and anything else in that category. Where the focus is mostly on avoiding punctures or lacerations of the sole and nothing in the way of support or cushioning. As someone who has multiples of the above, various trail and road shoes, and two pairs of Vapors too... to me the difference doesn’t appear to be obvious energy return like you’d expect with something like Pistorius’ blades. The return and cushioning seems on par with my old ASICS. The aggressive design underfoot though basically mandates efficient technique. My barefoot options do the same but through being quite unforgiving and painful if you get sloppy. Also worth pointing out that when I first put them on I definitely got the pace bump advertised but it came at a considerable stamina cost. They encouraged/forced me to run faster but it took quite a while to build back up to being able to maintain that for the distances I’d previously run.