David R. Jacobs

TL;DR: In this article, a coding scheme for classifying physical activity by rate of energy expenditure, i.e., by intensity, was presented for classification of physical activity using five digits that classify activity by purpose (i.e. sports, occupation, sel

TL;DR: A consistent inverse relation of high-density lipoprotein cholesterol levels and coronary heart disease event rates was apparent in BRHS as well as in the four American studies.

TL;DR: It is concluded that when nonmonotonic dose-response curves occur, the effects of low doses cannot be predicted by the effects observed at high doses, and fundamental changes in chemical testing and safety determination are needed to protect human health.

TL;DR: A questionnaire for evaluating energy expenditure in leisure time physical activity (LTA) along with information about its validity is presented in this paper, which is valid for use in longitudinal studies in North America of the relationship of physical activity to disease, in weight control clinics and in other researches in which leisure-time physical activity is of interest.

TL;DR: There are multiple, nonoverlapping dimensions of physical activity, reflected in multiple non overlapping validation realms, and most questionnaires were related to performance of heavy intensity physical activity and treadmill performance; these same questionnaires tended to be related to percent body fat.