Foreword<br > Stress is a relatively new concept in our culture<br >and yet most of us will eventually die of disorders re-<br >lated to our inability to cope successfully with it. In<br >an age when medical science has all but conquered<br >infectious disease， we still find ourselves faced with<br >the prospect of suffering--and possibly dying--from<br >one or more of the stress-linked disorders.<br > However， there is hope; for effective anti-stress<br >self-control procedures have been devised. Some，<br >like certain meditation practices， have been popular<br >in other cultures for centuries. Autogenic training，<br >an autosuggestive technique， was developed in Ger-<br >many some forty years ago， but only in the last few<br >years has its literature become available in the Eng-<br >lish language. Edmund Jacobson s progressive re-<br >laxation has been taught in the United States since<br > the 1920s， but perhaps the inherent simplicity of<br > this muscle relaxation procedure has prevented its<br > widespread acceptance in medical-psychological cir-<br > cles.<br > Now Western technology has evolved biofeed-<br > back--a technique for our time and culture--<br > electronic， precise， and demonstrably effective.<br >