Background Accurate assessment is required to assess current and changing physical
activity levels, and to evaluate the effectiveness of interventions designed to increase activity …

Despite extensive use over 40 years, physical activity questionnaires still show limited
reliability and validity. Measurements have value in indicating conditions where an increase …

The potential role of physical activity in the primary prevention of non-insulin-dependent
diabetes mellitus (N IDDM) is largely unknown. We examined the association between …

This study investigated the relationship between education and physical activity and the
difference between a physiological prediction of age and chronological age (CA). Cortical …

Physical activity is associated with better health; however, the optimal intensity of activity
remains unclear. A total of 13, 485 men (mean age, 57.5 years) from the Harvard Alumni …

More than 30 different methods have been used to assess physical activity. These methods
can be grouped into seven major categories: calorimetry, job classification, survey …

Objective.—To examine prospectively the association between regular exercise and the
subsequent development of non—insulin-dependent diabetes mellitus (NIDDM). Design …

Objective.—To examine the independent associations of vigorous (≥ 6 resting metabolic
rate [MET] score) and nonvigorous (< 6 MET score) physical activity with longevity. Design …

Validity and reliability of a short physical activity history were assessed in two studies.
Validity was studied in 2766 women and 2303 men, participants in CARDIA, a biracial study …

The authors prospectively studied the effect of demographic, reproductive, stress-related,
and health behavior factors measured at study entry on age of natural menopause in 185 …