Two other things to stir into the mix.
1. I was born with double fast-twitch muscles. There are two types, IIa and IIx. I have the later. Double fast-twitch muscles burn glucose and then recover later with oxygen. Many professional basketball players and football players have them.
2. My symptoms are quite a bit worse after recovering from COVID. I might have stated this before. And I want to thank The Mayo Clinic for their article "COVID-18: Long Term effects which is what led me to this group.