Whether it's your daily dealings at work or a pervasive concern for your physical safety, the stress you regularly experience may actually be more harmful than the threat that triggered it. Not only can it lead to isolation and an erosion of happiness, stress can be biologically harmful, bringing about health issues, such as heart disease, high blood pressure, ulcers, and strokes. In short, successfully managing stress could be nothing less than a life-or-death situation.

Now, professional biofeedback practitioner Harry L. Campbell presents What Stress Can Do, his...