Research Database

Objectively Measured Total Accelerometer Counts and MVPA: The Relationship with Biomarkers Using 2003 – 2006 NHANES

  • Presented on June 17, 2013

Purpose To contrast the associations of objectively measured moderate-to-vigorous physical activity (MVPA) and total accelerometer counts with biomarkers in a representative sample of U.S. adults. Methods Data from the 2003 - 2006 NHANES were used for this analysis. The sample included adults ≥ 20 y, not pregnant or lactating, who had self-reported PA ...


Moderate to Vigorous Physical Activity and Weight Outcomes: Does Every Minute Count?

  • Published on October 18, 2012

Purpose The purpose of this study was to test if moderate to vigorous physical activity (MVPA) in less than the recommended ≥10-minute bouts related to weight outcomes. Design Secondary data analysis. Setting Random sample from the U.S. civilian noninstitutionalized population included in the National Health and Nutrition Examination Survey (...


Accounting For Physical Activity In Sedentary Behaviour Research: A Theoretical Framework

  • Presented on June 17, 2013

Introduction Given its associations with morbidity and mortality, sedentary behaviour (SB) has emerged as a potentially significant public health issue. Although most studies of relationships between SB and health outcomes acknowledge that some sort of adjustment should be made for physical activity, there is no consensus on the approach for ...


Sedentary/active Behaviors And Cardiometabolic Risk: Protective Effects Of Sleep Duration, Nhanes 2005-2006

  • Presented on May 29, 2013

Optimal sleep duration (7-8h), moderate-to-vigorous intensity physical activity (MVPA) and light-intensity activity are beneficially associated with cardiometabolic outcomes and related biomarkers, while sedentary time and long (≥9h) or short (<7h) sleep duration are detrimentally associated. Purpose This study examined whether sleep duration modified the relationship between both sedentary/...



Recognizing Physical Activity Patterns Individually Using Hidden Markov Models

  • Presented on May 31, 2013

Accelerometers offer valid and objective measures to assess free-living physical activity (PA) (Kodama et al, 2002; Lyden et al, 2012). While these devices provide rich information with frequent readings over a period of time, the large amount of data is difficult to analyze and special techniques to extract features are needed. Summarizing ...



Association Between Biologic Outcomes and Objectively Measured Physical Activity Accumulated in ≥10-Minute Bouts and

  • Published on January 2013

Purpose Examine whether nonbout physical activity (i.e., <10 minutes' duration of physical activity [PA]) demonstrates a stronger association with health outcomes than bout physical activity (i.e., ≥10 minutes' duration). Design Cross-sectional study. Setting NHANES 2003–2006. Subjects A total of 6321 participants ranging in age from 18 to 85 years. Measures Objectively measured PA ...


The Relationship of Actigraph Accelerometer Cut-Points for Estimating Physical Activity With Selected Health Outcomes: Results From NHANES 2003-06

  • Published on September 2012

The purpose of this study was to examine the influence of child and adult cut-points on physical activity (PA) intensity, the prevalence of meeting PA guidelines, and association with selected health outcomes. Participants (6,578 adults ≥ 18 years, and 3,174 children and adolescents ≤ 17 years) from the National Health and Nutrition Examination Survey 2003-06 (Centers ...