The new Chevelle song "self destructor" is a jam. I didn't care for it all that much at first but it's grown on me. Here's a few other songs added to my Gym Workout list on Spotify:
1) Deftones- "Bored" & "my own summer" (shove it)
2) Down- "Lifer"
3) Godsmack "Greed"
4) Hatebreed "I will be heard"
5) Korn "faget"
6) Life of Agony "Let's pretend"
7) MM "Get Your Gun" & Say10
8) Melvins "honey bucket"
9) Ministry "Just one fix", "Lava",
10) Mudvayne- "Dig", "happy?"
11) NIN "Last"
12) Pantera "Drag the Waters", "slaughtered", "Yesterday, don't mean shit"
13) Incubus "New skin"
14) Hanzel and Gretyl "Black Forest Metal"
15) Dawn of Ashes "blood of the titans"....this song is sick
This is a good start. I have a large list of songs.