It may not feel this way, but when your body amps up into all-systems-go mode, it may actually be preparing you to handle stress better than if things had stayed calm. The key, according to psychologist Sian Beilock, is how you view physiological changes that are out of your control. Putting a positive spin on things can lead to top performance, while freaking out might cause you to choke.

Have you noticed this in your own life? Can you control your mind's reaction to your body's?