nickcoury · HackerTrans

29 hari yang laludiscuss

This reminds me of 3.5 inch floppy drives. They were last manufactured in 2011. You can still buy "new" ones where they pull internal drives from old corporate machines and then wrap them in a new plastic enclosure with USB converter board to make them an external drive.

nickcoury

2 bulan yang laludiscuss

I visited the Tarahumara and ran the race in his book 4 times. I know Chris personally and he's certainly a storyteller and not a scientist to put it simply. I was similarly bothered by these kind of claims and he wasn't the first to make them. I did some research papers in college on this years ago.

Surprisingly, these claims are more true than false, though in no way completely true. There are some fascinating cultural mechanisms that enable each one. But they were also largely dependent on their society being extremely small and living in remote hillsides and only coming together for certain social events. Not very applicable to modern society.

nickcoury

3 bulan yang laludiscuss

Yes, that's correct. There's a mistaken belief that it's the major source of performance improvements. It plays a role, but the bigger gains come from the stack height (limb lengthening effect) and the energy return of the foam. But that leads to very unstable shoes. The carbon gives rigidity to balance this out.

nickcoury

3 bulan yang laludiscuss

Quite possible there's a psychological benefit from super shoes, they certainly feel fast. Though there are enough plausible mechanisms it's unlikely to be the major factor.

nickcoury

3 bulan yang laludiscuss

Yes, most of the studies show there is a very large individual variation. The original 4% figure and similar studies were an average of something like 1-7% across runners.

Also interestingly, the shoe in this record uses much less carbon than past shoes, both saving weight and allowing even more super foam where much of the energy return comes from. Though there so much variance in shoe design and materials there are only theories on how much comes from the plate vs foam vs stack height vs weight vs other factors.

nickcoury

3 bulan yang laludiscuss

I reference Jakob's Law at least once a week, which says users use not your site most of the time. So if it works like most other sites then users will intuitively understand it. And if you do something different users will struggle to learn it.

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