I was thinking about the impact numbers I've been seeing and wondering how that translates to impact transferred to the body. What caught my eye was the higher impact numbers I was seeing from my most cushioned shoes (Hokas). Whether a road version or trail version Hoka, they had higher impact numbers typically than less-cushioned shoes. They are also the heaviest shoes I own so maybe that has something to do with it? But my legs feel better running in Hokas so I'm not sure what to think about the data. I need to do more testing with consistent pacing as the pace will also effect impact. Just curious if anyone else has been testing several different shoes and saw anything interesting.
5 comments
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Tim Clark Hi Tim -- what I consistently see when running in Hokas compared to other (less) cushioned shoes is a pretty big reduction in the Braking Gs. Whenever I start running in my Hokas, for first few minutes I can really 'feel' the difference, they feel much softer, but as the run wears on, that perception changes. I believe this is just your body/mechanics adapting to the cushion. What you can't 'adapt' to is the reduction in Braking Gs, which is that additional cushioning causing you to slow down less suddenly.
If you're willing -- post some of your Avg Impact/Braking Gs for both types of shoes. Love to see them and others as well! -
Tim Easterday I don't see much difference in braking g's on similar surfaces. Trails show less braking g's but not much less impact g's. I definitely need more runs and more data to reach a serious conclusion.
Here is some run data (braking g / impact g):
Hoka Conquest 2 8.4 / 8.5 (asphalt)
Hoka Conquest 2 8.7 / 8.4 (concrete)
Hoka Stinson ATR 7.2 / 9.5 (trail)
Mizuno Sayonara 2 8.1 / 9.0 (asphalt) -
Tim Easterday Actually the data I posted is not really a good example, but from different days/places. What I did was took 3 pairs of road shoes to a paved loop and ran an equal amount in each. Then took 3 pairs of trails shoes to a trail and did the same. The numbers I am seeing could just be the result of getting tired.
Paved Path (braking g / impact g):
Mizuno Sayonara 8.1 / 9.0
Mizuno Enigma 8.3 / 9.4
Hoka Conquest 9.5 / 9/5Trail:
Salomon XT Wings 7.6 / 8.2
Montrail Bajada 7.1 / 9.1
Hoka Stinson 7.2 / 9.5 -
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