I mentioned a study I had heard on this but didn't have the details. I haven't gone looking either actually but came across another source.

Muscle Testing

I have seen it demonstrated (actually once on me) in lectures and experiemented with it in a class. My strength coach has also done it to me.

Recently I started looking into it a little more for myself, doing some reading and experimenting on people.

Anyway, they have found with rock music that the thymus weakens (also the deltoid). Now thymus should effect quite a bit too...

Now this was written in the 70s so newer 'rock' music may or may not have the same effect as they figure its to do with the specific rythem of the beat.

Without going into details, no other type of music seemed to have this same effect.

No the positive/negative content i'm sure has some effect too but this was totally to do with the beat.

I suspect rap (which I think is missing a 'c') would not have the same weakening effect as 'rock', at least not from the beat.

With muscle testing (muscles are connected to organs etc and if the muscle is weak you know something is going on with the organ...) one could find out what eeffects them specifically. Like flouresent lighting is no good for anyone but one might or might not test weak under the lighting. Toxic chemical cleaners are crap for anyone but the amounts used may cause one person to test weak and not another... That wouldn't mean they aren't bad but that they aren't effecting at such a large degree...

You can do it with foods, music. If you smile you test stronger and if you frown you test weaker (gets back to what I believe in performance-this agressive/negative state doesn't lend to performance IMO).

Even symbols can effect us... Surprising which ones too (won't get into that). But the body CANNOT lie.

Either way the beat in rock (which I love many rock songs) will make you weaker!! (by the way the thymus plays a big role in the immune system...