Physical reactions? Hmm, not directly - I think any physical reactions come as a second stage event following mental/emotional reactions. But there is definitley a link....Bobsticks reactions to Jazz/Classical certainly echo my own.

Maybe one exception - there's nothing like getting in the squat rack with Megadeth or Opeth playing. I can pretty much feel the intensity loss and have to take a few pounds off the bar with nothing playing - I've never tried lifting with Enya or any music you might find at a wellness clinic. Maybe this is all second-stage, post brain related too.