Good And Tired Or Just Tired?

I know after running I feel good and tired.
I know after spinning I feel good and tired.
I know after hiking Misery Ridge I feel good and tired.
I know after riding my bike I feel good and tired.
I know every day I go to the gym I feel good and tired
I know after a day of working in the yard I feel good and tired....

but....

just give me one day in front of a computer trying to figure something out and I am just tired.