Weight: 5.7 oz (size 9)
Stack Height: 15mm / 15mm
Classification: Cross Country Racer, Minimal Trail Racer
Editor's Note: From observing David's running pattern, he lands in a very inverted (sole of the foot pointing in) foot position and rolls inward (aka pronates)... sometimes. He also at times actually rolls outwards and stays supinated from heel to toe or toe to toe (instead of resupinating AFTER pronating to absorb shock). So his gait adapts to changes in terrain and whatever is going on biomechanically up above. We worked on some hip weakness early that seemed to reduce some excessive loading issues toward the feet. The important note is that you should never just look at the foot. Often what happens there is a result of mechanics and movement up higher.
Editor's Note: As David is saying, the wider toe box and true zero drop platform (not negative drop as often happens with the raise spike plate in many competition shoes) may promote more natural pronation and foot mechanics. Your feet will spread a bit upon impact, which is an important method of shock absorption. Further freeing up the forefoot allows for a better positioning of the first toe, which is crucial for the resupination moment as you progress forward to toe off. The peroneus longus anchors there and helps facilitate the normal function of that area along with the powerful calves and posterior tibialis resupinating the foot. Narrow spikes can definitely squish the feet and limit the function of the the hallux (big toe) in some people, while others may be able to get away with this. Why not design a natural fitting spike that allows all the parts to work correctly? I for one am happy to see a more comfortable fitting and naturally designed spike. I look forward to the evolution of this shoe and hope to see a pure track spike version at some point. Although the Vanish-R may have that spot now.
Thanks for reading!
-David Salas, SPT
Doctor of Physical Therapy
Kaiser SoCal Clinical Specialist Fellow - Manual Therapy and Sport