I have a couple of playlists for running, and a playlist for weightlifting. I even have a kind of a playlist for climbing - you can't really use an iPod while climbing, but I often hear music in my head when I'm on a particularly tricky bit of wall. (Once in a while, Planet Granite obliges me by playing one of my climbing songs outside my head.) Climbing songs have a lot in common with weightlifting songs, except that they have a statistically significant lyrical focus on climbing, falling, or vertical movement, and are generally selected based on the Hollywood movie soundtrack principle that any death-defying move done to the accompaniment of a sufficiently badass guitar riff has to succeed.
So, I thought it would be fun to post a song from each of my playlists.
Running song: "I Ran" by Flock of Seagulls. I think you are required to have this on your iPod if you run.
Weightlifting song: You get bonus core work from trying not to laugh at the lyrics. "I'm Sexy and I Know It" by LMFAO.
Climbing song: "Do Not Look Down" by Meshuggah.
Do have a favorite workout song? Post a link in the comments.