So I have a slightly different effect from exercise that may add some perspective on the discussion. If I do normal exercise without high heart rate, it doesn't do much either way for me. If I do intensive exercise (high intensity interval training or high heart rate), it significantly reduces brain fog and slowness for a day or two. If I do it every other day, I'm good for most of the week.
What I've discovered as a function of this is twofold:
1) this appears to jump start my metabolism and keep it going.
2) when doing this exercise, I find that in the afternoon, I sometimes see symptoms that further choline might help. I take choline at night, which may mean the afternoon is when I will be at a low point. My guess is that I process the choline through my system faster as a result of high heart rate exercise
I also believe there's a spectrum of choline related issues on this site. If I have too much choline I reproduce a different set of the pois symptoms than if I have too little.
I think the exercise and speed of processing of choline may relate to this observation in that it moves the dial on how much of a particular vitamin or chemical is in the system or how much is processed.
My 2 cents in case it's helpful.