Mental versus physical

I feel like I have done nothing all day

Which brings up an interesting argument; mental versus physical fatigue…is one worse than the other?

Because I can walk all round Joondalup, drive out to Bullsbrook and dismantle and chicken coop shed and be fine,

but ask me to read five journal articles and a bunch of statistical brochures and I’m dead.

Today was the journal article day, and it’s just gone 5pm and I feel like I could sleep for a year, I hurt all over and my head feels really heavy…

I just wonder…mental fatigue… Interesting research topic maybe?