Nothing says serious training like the heavy guitar riffs and high-pitched screams of the metal classics. Lift heavy weights and rock out to this list of the greats.

1. Metallica, "Creeping Death"

Via Blackened Recordings

2. Nine Inch Nails, "March Of The Pigs"

Via Interscope Records

3. Megadeth, "Holy Wars... The Punishment Due"

Via Capitol Records

4. Alice In Chains, "man In The Box"

Via Sony BMG Music Entertainment Inc.

5. Judas Priest, "Painkiller"

Via Sony Music Entertainment Ltd.

6. Iron Maiden, "Run To The Hills"

Via Iron Maiden Holdings Ltd.

7. Slayer, "Angel Of Death"

Via American Recordings, LLC

8. Faith No More, "Epic"

Via Slash Records

9. Ac/Dc, "T.N.T."

Via J. Albert & Son (Pty.) Ltd.

10. Motley Crue, "Kickstart My Heart"

Via Masters 2000, Inc.

11. Ozzy Osbourne, "Bark At The Moon"

Via Sony Music Entertainment Inc.

12. Pantera, "Domination"

Via Atlantic Recording Corporation

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