Pain is (apparently) good for you

I've been spending a bit more time on the bike these days. Riding up the hill to Bodysnatchers from Radiohead today. Rocking guitar is perfect for inducing hill climbing pain. Especially just before the 3min mark on this track.

This has to be contrasted with a couple of weeks ago where the last song I heard before going outside to shift a cubic metre of dirt was this classic from the Wiggles. 

I don't know what hurt more at the end of the day - my arms or my mind. I do believe there is an art to choosing the song you last listen to before you walk out the door.