Research Database

26 results for "Accelerometer"

Change in Physical Activity During Active Treatment of Cardiac Patients

  • Published on April 2017

Abstract: Sedentary secular, domestic, and recreational behaviour is a major risk factor (RF) for cardiovascular disease (CVD). This study examines the quality of at-home physical activity (PA) and how it relates to physical fitness (PF) before and during 12 weeks of supervised cardiac rehabilitation (CR) in a group of medically referred ...


Age- and sex-related differences in heart rate variability are present despite the suitable level of accelerometer-based physical activity

  • Published on May 2015

Background: Previous studies have described the age- and sex-related differences in heart rate variability (HRV) regardless of the level of physical activity in daily life (PADL). However, such studies were based in the assessment of PADL by means of questionnaires, which present important recall limitations. The influence of age and ...


The Impact of Low Accelerometer Wear Time on the Estimates and Application of Sedentary Behavior and Physical Activity Data in Adults

  • Published on Dec 12, 2017

Background: This investigation sought to determine how accelerometer wear (1) biased estimates of sedentary behavior (SB) and physical activity (PA), (2) affected misclassifications for meeting the Physical Activity Guidelines for Americans, and (3) impacted the results of regression models examining the association between moderate to vigorous physical activity (MVPA) and a clinically relevant ...


Physical Activity Assessment with the ActiGraph GT3X and Doubly Labeled Water

  • Published on Sep 2017

Purpose: To compare the degree to which four accelerometer metrics-total activity counts per day (TAC per day), steps per day (steps per day), physical activity energy expenditure (PAEE) (kcal·kg·d), and moderate- to vigorous-intensity physical activity (MVPA) (min·d)-were correlated with PAEE measured by doubly labeled water (DLW). ...


The impact of accelerometer wear location on the relationship between step counts and arterial stiffness in adults treated for hypertension and diabetes

  • Published on Aug 24, 2017

Objectives: Accelerometer placement at the wrist is convenient and increasingly adopted despite less accurate physical activity (PA) measurement than with waist placement. Capitalizing on a study that started with wrist placement and shifted to waist placement, we compared associations between PA measures derived from different accelerometer locations with a responsive ...



Youth Oriented Activity Trackers: Comprehensive Laboratory- and Field-Based Validation

  • Published on Jul 19, 2017

Background: Commercial activity trackers are growing in popularity among adults and some are beginning to be marketed to children. There is, however, a paucity of independent research examining the validity of these devices to detect physical activity of different intensity levels. Objectives: The purpose of this study was to determine ...


Concurrent Validity of Daily Activity Data From Medtronic ICD/CRT Devices and the Actigraph GT3X Triaxial Accelerometer: A Pilot Study

  • Published on Jan 2017

Purpose: The purpose of this pilot study was to examine the concurrent validity of daily activity data from Medtronic implantable cardioverter defibrillator (ICD) and cardiac resynchronization therapy (CRT) devices and the Actigraph GT3X triaxial accelerometer in patients with heart failure (HF). Methods: Analysis of the first 16 subjects with HF ...


Objectively measured physical activity patterns, sedentary time and parent-reported screen-time across the day in four-year-old Swedish children

  • Published on Aug 1, 2017

Background: Physical activity (PA) improves health outcomes accumulating evidence suggests that sedentary time (ST), especially parent-reported screen-time, is associated with negative health outcomes in children. The aim of the present study is to describe levels and patterns of PA and ST across the day and week and activity pattern differences ...