It is truly remarkable what some humans can do when they commit. There was a person in my former runner group who weighed approx. 130 kg when he started running

It is truly remarkable what some humans can do when they commit. There was a person in my former runner group who weighed approx. 130 kg when he started running. He only started when he was in his mid-forties. Never really exercised previously in his life (as far as I know). It is also worth mentioning that he is a farmer, so his day job is not exactly energy conserving. Ten years after starting to run in this group he was set to run a marathon under 2:50. Unfortunately a cramp around the 30 km mark made it impossible to continue and actually achieve it. But his grit certainly motivated everyone around him, marathoners and short-distance runners alike. I would love to share his eating habits but I do not remember them in detail and I do not know enough about nutrition to confidently share any presumptions on this part. Your first paragraph simply reminded me of this great individual.