Anxiety can strike behind the blocks before an important race or interrupt quality sleep. In the worst situations, it can make every day a stressful experience. Studies show that most Americans breathe incorrectly. Poor posture, tight-fitting clothing, diets that raise heart rate and blood pressure, and rushed, stressful living all interfere with breathing quality. Improper breathing can impair health, whereas quality yoga breathing can improve immune function, hypertension, asthma, autonomic nervous system imbalances, and stress-related disorders.