More:
https://podiatryfaq.com/knowledge-base/what-are-negative-heel-shoes/
https://podiapaedia.org/wiki/footwear/types/negative-heel-shoes/

Did not know that YouTube was that old!

This advertisement from 1921 was advocating the use of bunion correctors

Variations of these vintage bunion correctors are still being used today. And they are still being debated if they actually work or not or are just snake oil.

These running shoes were popular in their day as a well padded but lightweight running shoe. they were the result of a collaboration between the famous running coach, Arthur Lydiard and Converse.

See the Running Heros entry

Everyone is looking for short cuts to increasing fitness. This is nothing new:

Today this is manifested in the new toning shoes that are being marketed to increase fitness. These shoes have been attracting a lot of interest lately, but the marketing or advertising claims for the toning shoes has led to legal issues for some of the companies.

Chilblains are a common problem in colder climates. They have attracted a lot of “cures” over the years:

The Romans in the first century AD apparently used beetroot juice for chilblains, but for more modern approaches in use see this chilblain cream.