This is really interesting. I didn’t even know humans had spongey lightweight bone, figured it was all the good strong stuff, and spongey marrow. It’s very cool that it can re-form to account for different activities.

I’ve always preferred being barefoot, like basically always including running, and basically never wear shoes if I can help it. When I try to run in shoes I always twist my ankle no matter how careful I am, with the exception of split sole wrestling shoes or other ultra-thin-sole shoes that allow for running the aame way as barefoot, and now I understand a bit more of why! My spongy bones (and probably tendons and other stuff) just aren’t used to that kind of activity. Neat!