That’s interesting. One thing I’ll note about “energy” is that I suspect it can be subdivided further. For instance, I think that mental fatigue (e.g., after doing hard math problems for an hour) differs from physical fatigue (e.g., after lifting weights hard for an hour) which differs from sleepiness (e.g., when you haven’t slept for a long time), and I also suspect that mental slowness (e.g., like some people get upon waking or when drunk) is a fourth thing. It sometimes seems pep/enthusiasm are yet another thing that it’s meaningful to distinguish from the others (you can feel a lack of fatigue without having pep).
Agree. I think most cases in modern worklife and productivity questions boil down to the mental fatigue + mental slowness components, which in my mind would be correlated but distinct.
That’s interesting. One thing I’ll note about “energy” is that I suspect it can be subdivided further. For instance, I think that mental fatigue (e.g., after doing hard math problems for an hour) differs from physical fatigue (e.g., after lifting weights hard for an hour) which differs from sleepiness (e.g., when you haven’t slept for a long time), and I also suspect that mental slowness (e.g., like some people get upon waking or when drunk) is a fourth thing. It sometimes seems pep/enthusiasm are yet another thing that it’s meaningful to distinguish from the others (you can feel a lack of fatigue without having pep).
Agree. I think most cases in modern worklife and productivity questions boil down to the mental fatigue + mental slowness components, which in my mind would be correlated but distinct.