[wayner]

Exercise does burn off the stress, I think in addition you have to find the source and address it (not remove the source but rationalize it).

In the moment see if you can step back and think about what might be causing the reaction and rationalize it.

Some good info out there about Post traumatic stress. Apparently some of the techniques that work on combat troops is to repeatedly put them back into simulated situations as an observer of the situation until they no longer react with stress, because they know everything will turn out ok.

I'm no expert and I may be way off in left field, but if you are repeatedly in a normal situation at work that causes abnormal reaction, maybe you don't need a simulation, just the awareness of what is happening in the moment and use each moment as practice and retraining that part of your brain until eventually the reaction is back to normal.

I'd look for something on PTSD and see if you can find some tips, or deal with a professional who can guide you.