answer:It’s not an uncommon strategy to use anger to power oneself through difficult tasks, especially for people to whom anger comes easily. Anger is a source of energy, and that energy can be channeled to get stuff done. My wife consciously does this. She tells me how, back in her backpacking days, she used to work up a good anger to get her over tough stretches of trail. She still occasionally does it to get through dreary jobs. It’s a powerful source of energy. Maybe your military training taught you this. The downside is that, as you’ve noticed, the physiological aftermath of anger doesn’t feel so good.