Importance It is unclear whether the number of steps per day and the intensity of stepping
are associated with lower mortality. Objective Describe the dose-response relationship …

Background Although 10 000 steps per day is widely promoted to have health benefits, there
is little evidence to support this recommendation. We aimed to determine the association …

Methods This article reviewed the literature on the methods used to evaluate the validity of
contemporary consumer activity monitors. A rationale for focusing on energy expenditure as …

Importance Although the benefits of leisure-time physical activity (LTPA) in middle age are
established, the health effects of long-term participation and changes in LTPA between …

Objectives To examine whether moderate-to-vigorous physical activity (MVPA) modifies the
association between sedentary time and mortality and vice versa, and estimate the joint …

Methods| This cohort study was approved by the National Center for Health Statistics Ethics
Review Board. This study used data from the National Health and Nutrition Examination …

Background The 2008 Physical Activity Guidelines for Americans recommends that adults
accumulate moderate‐to‐vigorous physical activity (MVPA) in bouts of≥ 10 minutes for …

Purpose The purpose of this study was to calibrate and cross-validate the Youth Activity
Profile (YAP), a self-report tool designed to capture physical activity (PA) and sedentary …

Purpose Statistical equivalence testing is more appropriate than conventional tests of
difference to assess the validity of physical activity (PA) measures. This paper presents the …

Parenting behaviors are known to have a major impact on childhood obesity but it has
proven difficult to isolate the specific mechanism of influence. The present study uses …