More lifestyle diseases you can easily fix: 10-13% of all Americans over 60 develop osteoarthritis. Walking barefoot significantly softens the knee load. Ditch the sneakers (now!) in favor of thin leather sole shoes and go barefoot whenever possible. https://onlinelibrary.wiley.com/doi/full/10.1002/art.22123

Osteoarthritis is very painful (treatments are expensive too) and leads to a host of other health complications/problems, including a significantly higher risk of opioid addictions and subsequent overdoses. Throw your sneakers out and start wearing moccasins.

Here are Masai (a people in Kenya) sandals, made from rawhide (ox or cow). You can trust the Masai to know about foot health and walking! Rawhide sandals or wraps are extremely cheap, available anywhere, takes no special skills to produce, sustainable, recyclable, easy to repair.