Ok Ceph Star. My list is really long. So here's some.

Tiny Planets - Sports
Infinity Guitars - Sleigh Bells
The Champ - Ghostface Killah
Modern Art - Black Lips
Anti Parent Cowboy Killers - Joanna Gruesome
Brill Bruisers - The New Pornographers
Huddle Formation - The Go Team

This all pretty much encompasses the spirit of my running / treadmill / gym list.
Its also awesome music in general. Though I know thats a really subjective opinion.