Prior to the pandemic, I hadn't cycled since the late 80s... and for the first few months after resuming, I cycled mid-foot, but switched to forefoot which increased speed. The same has happened in the past with much more regular running, and might again - running like an animal can get one to dizzying speeds. There is archeological evidence which suggests we used to commonly run around at about 23mph - as fast as an Olympic sprinter:
20,000-year-old footprints have been found in Australia, documenting five human hunters that sprinted across what is now New South Wales, Australia.
www.nationalgeographic.com
... perhaps as part of the strategy to exhaust prey, with a final sprint to the kill. With slow running, I end up landing mid-foot with very little impact because strides are so small, and my elevation is very minimal. I would love to run barefoot, but will not risk it on these biohazard pavements. Could try it if I bought my own treadmill, or after applying copious quantinties of isopropyl alcohol all over one at a gym.
My right hip has a touch of arthritis, must run more often to clear it - causing a little damage through exercise reminds the immune system that it should be repairing the body, instead of being a dick. Running gives it a reboot.
Chest pains have completely disappeared after giving up cheese and dead animals (apart from the occasional fish), which leaves more room to eat throiugh the massive stock of beans I doomsday prepped two years ago. And with food being at such mad inflated prices, it's saving me a lot of cash too.