A stress reduction program developed by NIOSH is reviewed. Two ways to accomplish stress reduction are discussed: reducing the impact of stress on the health of the worker, or modifying work practices or organizational characteristics that produce stress. The NIOSH approach deals with methods that seek to reduce the health impact of stress and improve the ability of workers to cope with stress. Methods are outlined that include biofeedback, progressive muscle relaxation, and cognitive structuring, as well as simple meditation and relaxation techniques. Benefits of relaxation training include improvements in work performance and greater job satisfaction with fewer reports of health symptoms and illnesses. Biofeedback and muscle relaxation training programs for use within company organizations are assessed and are designed to be training oriented and preventive, rather than treatment oriented or therapeutic. Evaluation of program effectiveness in organizations shows long term benefits 3 months after training. These include improvements in ability to cope with stress and the frequency of coping in biofeedback and muscle relaxation groups. Fewer sleep disturbances, increased work energy, and greater job satisfaction are reported. Biofeedback training produces greater reductions in muscle tension than the muscle relaxation type of training, but reductions in subjective tension and better sleep quality are reported for both methods.