Poor air quality, which can be influenced by a variety of fumes, chemicals and allergens, is arguably the leading cause of triggers for most asthmatics in urban areas. ↗
The amygdala in the emotional center sees and hears everything that occurs to us instantaneously and is the trigger point for the fight or flight response. ↗
You can hit your legs really hard, you can get very, very sore from training and I love that, but, the one I'd feel most on stage is legs. But, the thing that happens is once the adrenalin kicks in, that's the trigger. ↗