>run for 30 minutes
>feel like death stalks me
>nauseous, tired, drained of all energy, when I get back home it's all I can do to drag myself into the shower and bathe
>feel like I'm sick for the rest of the day
>lift weights for 30 minutes
>feel fucking great
>full of energy, everything is lighter, when I get back home I'm horny as hell because my body is full of endorphins or dopamine or something, it's all I can do to not jack off in the shower
>feel like everything is going to be okay for the rest of the day
Why does running suck so hard?