knob3 wrote:
I heard it use some modern engineering design that help to push to its 4% it might be true or marketing purpose but I'm sure there's a lot of science / testing behind that.Hello
Did you read the nov 2017 research article, establishing the 4% gain based on a proto ?
https://link.springer.com/...07/s40279-017-0811-2
The "modern engineering design" is essentially : lot of cushion
More precisely a lot of HEEL cushion, with reasonably springy foam.
This heel cushion, when used, authorize the runner to less bend the knee, gaining leg stiffness for free. Leg stiffness for free bringing physio efficiency.
The VF are also light, but the article explain it bring very little.
Foam is springy, but that is not the main point. Look at absorption figures.
They have a carbon plate.... well... bringing a little stability to the blob of foam... and some snap.... but doubt it bring much (OK, can't prove it). And the guys writing the article also doubt.
Last edited by:
Pyrenean Wolf: Nov 22, 18 2:29