Hyperarousal, Hypoarousal, and the Window of Tolerance: Understandably many people right now are under tremendous amounts of stress. Our bodies have a natural system to handle stressful experiences, and when that system is activated we become hyperaroused (i.e., fight or flight) and/or hypoaroused (i.e., freeze). Knowing how your body reacts in each of these states can help you recognize your stress earlier, and therefore allow you to take care of yourself earlier