I often listen to Dark Tranquillity and In Flames. Placebo, MuteMath, and 30 Seconds to Mars are frequently on playlist as well, though I suppose these don't get much love in this forum
I used to listen to Machinae Supremacy, Soilwork, and System of a Down as well, but I've grown sick of those. Periphery works wonderfully, but I don't have the album yet, just some old recordings of a few songs
TBH, most of what I listen to is way too slow for working out, so I end up listening to the same stuff over and over.
Running is the only activity I dont like music with (and swimming, but only because I dont want to wear the underwater crap) but for everything else its generally Rage Against the Machine, Meshuggah, and assorted other things.
When I had to walk alot, I packed my mini-disc player with Satch, Malmsteen and Cacophony. Speed Metal Symphony was my personal favourite... But this was walking so I am not sure about running, I am a lazy S.O.B .......
I've always used the prodigy for my running workout. Or slayer! Makes me run much faster My current soundtrack for lifting weights: 1. Periphery: Eureka 2. Tony Danza Tapdance Extravaganza: I Am Sammy Jankis 3. Whitechapel: This is Exile 4. Suicide Silence: Suffer 5. Architects: One of these days 6. Fear Factory: Mechanize, Moment of Impact, Terminate, Powershifter 7. Meshuggah: Bleed 8. Ion Dissoance: Kneel and Scorn Haven 9. The Haunted: D.O.A. 10. The Acacia Strain: Terminated 11. Seven: Down the Ruin 12. RATM
I used to use Explosions in The Sky, mainly because I would get distracted/zone out from working out if it was something real heavy so I went to the opposite direction and did something calming and it made working out awesome
I tend to use the The New Order album by Testament, starting with the title track. That one worked really well for me, plus some extra tracks I liked at the moment.