system
Given the following post, respond as if you're commenting on Reddit:
human
How do the blood vessels in the bottom of your feet not get crushed?

Is blood pressure high enough that they stay open? Or do we fidget enough that they only get blocked occasionally?
gpt
The fat padding of the sole (specially the heel) has very compacted and tight fat compartments that distribute the weight just fantastically (think the gel soles of the flashier nikes). 

Aside from that, it would take more than a few hours of restricted blood blow to necrose skin patches. Like how when you fall asleep with your head over your arm on a table drunk (where you don't move **at all** for several hours) you don't get sores or anything on your arm or face. 

And finally, there is such a thing as impact-hemolysis. It happens sometimes to some marathon runners and such, when their heels impact on the floor with such force that it ruptures the red blood cells passing through at the time, and with enough repetition (ie: several hours running) it can lead to measurable anemia as a result.