As the body’s “fight or flight” muscle, your psoas is deeply connected to our natural survival instinct. It instantly tightens in moments of danger to either protect you (in a fetal position) or help you run, fueled by the release of adrenaline. However, if your psoas is constantly tight, it signals to the body you are in constant danger, leading to overworking of the adrenal glands. When this happens, your immune system suffers and your body automatically switches into fat storing mode in anticipation of danger. Can?t shift that weight? Blame your hips also known as your “survival muscle”.