feel like killing everyone in sight - is this an exercise hangover?

[Allfednonedead]

Does anyone else find they have a foul temper the day after they exercise?
My post-exercise rage makes PMS look like sweetness and light.
Thanks to my sports watch, I’ve worked out that it happens if my heart rate goes too high when I’m not used to it, but that in itself isn’t predictable - yesterday I did an easy run that sent my heart rate over 190, and today I’m murderous.
I have an under active thyroid, and speculate there may be some connection, but don’t know if there’s any point in talking to a doctor about it.
I’ve had an ECG and it was fine.

I’ve never thought of that link but I know my teen makes me thunderous as does life in general. Defo see if there’s a pattern and maybe moe sporty folk might know the science.