I only experience physical exertion induced PEM, not cognitive nor emotional.
I will also experience PEM if I use my arms - it doesn't even have to be heavy stuff, which would obviously cause PEM due to effort to lift / carry - but also reaching above my head for multiple items off a shelf will cause almost immediate malaise.
Though, I'm not sure if that's because there is extra exertion to push blood up my arms or if there is something wrong with my actual arm muscles.