thesinner
Recovering AXoholic
I recall watching something on either the History or discovery channels about how loud noises and acute pain/voilence (i.e. a big ol' slap on the back, etc.) activate a certain part of the brain. They were saying that's why sports teams will cheer and hit each other on the benches to get "pumped up" before a sporting event. Heavy metal, with the yelling, loud noises, and oftentimes the subject matter within the song, seems like a perfect compliment to work out with. The Mastodon song in Silent B's siggy is probably a good example of this: yelling, loud noises and "white whale holy grail" being a metaphore for overcoming challenges and adversity.