The effects of physical activity on the human skeleton are examined. Research studies are cited that indicate exercise may be beneficial in maintaining or increasing bone mineral content. Effects of exercise on the prevention or treatment of osteoporosis are uncertain. (DF)

Objective: The authors describe the approval processes for subspecialties and the mechanisms for certification and recertification and review the status of training programs and numbers of diplomates with subspecialty certification. Methods: Published information and relevant data bases were reviewed. To date, 5,327 child and adolescent…

Characteristics of the target population, services, and potential source of helpers are determining factors in the cost effectiveness of home health services. Welfare of patients in the experimental group was improved, and lower probability of residential care helped keep costs down. (JAC)

The first of eight articles discusses the current state of the sensitive but unclassified information controversy. A series of six articles then explores the use of integrated information systems in the area of health services. Current trends in document management are provided in the last article. (CLB)

Describes the results of projects exploring the potential of information technology for delivering health care. Describes a proposed project coupling the telephone with computerized audiotext responses, which would provide elderly patients with information, contact, and reassurance. (SR)