7 minutes ago
Last assessment of the Nike Vaporfly 4% Flyknit super-shoes before @londonmarathon...
I didn’t want to commit without testing the new wheels on a longer run, to ensure they don’t rub after an hour or two of activity. For longer events, comfort is still a more important metric than speed for me: discomfort begets pain which begets injury, far outweighing any speed gain. Some observations below.
My UK Size 10’s weigh 217 grams, which is absolutely fuck all (my socks are heavier). This is important as research shows that running economy is reduced by 1.1 percent for every 100 grams of weight added to the shoe. It did feel easier to maintain a higher cadence as I fatigued, and I decided to attribute this to the lightweight Vaporfly, but it could just as easily be a placebo effect, or a result of taper week. The point is, they’re light.
I bought a half size under my usual as I like a racing flat to be snug (heel slipping on race day is a big no no), so was concerned they might feel tight. However, the ‘flyknit’ mesh upper seems to have expanded to accommodate my unnaturally wide trotters, with no loss in tightness around the heel.
Carbon Fibre Plate ✅
The plate that runs through the midsole aims to stabilise the ankle and keep the toes straight. As a slight pronator (these shoes have neutral support), my ankle felt less stable than in my, typically high-arched, sneaks of choice. That said, there was no tightness in my calves afterwards, suggesting they took the morning off. My toes most certainly had a break, not flexing once. Energy saved?
ZoomX Foam 🤷🏼♂️
The easily perceptible ‘spring’ or ‘bounce’ felt in the heel when walking is somewhat absent when running. I’m wondering if some of the benefit is lost when the wearer adopts a ‘proper’ forefoot strike as opposed to a heel strike, as although the magic foam runs throughout the sole, it is much denser in the heel.
So far, the only negative I can discern is the price tag. And whether the cost is justifiable or not will ultimately come down to race day. Final report to follow.
#TaylorGoesSub3 #LondonMarathon #LondonMarathon2019 #LondonClassics #EmptyTheTank at Victoria Park