It's weird me personally I do feel "tired" but in the sense that I feel tired but my body just keeps going because it's all in your head I tend to go for a 20km bike ride and I'm all good, expet for melting into my bike seat XD
Half the time on mushrooms I don't even wanna move so yeah I'd say they make me lethargic (one of the reasons they're far from my psychedelic preference, although I still have plenty of love/respect for them)
The high feels quite similar to LSD but without the stimulation. It doesn't activate dopamine receptors like LSD does. LSD always gives me a shitload of energy whereas shrooms make me feel really lazy (a bit like how pure MDMA does). 2C-E does this to me as well.
I think they can make you a bit dizzy, so people tend to sit down to enjoy them more so than other substances. However, sometimes they can make you feel very restless and uncomfortable. Psychedelics require stimulation and when you don't feed them, they aren't going to settle nicely.