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

  • Published on Aug 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 ...


Evaluation of the wrist-worn ActiGraph wGT3x-BT for estimating activity energy expenditure in preschool children.

  • Published on Oct 2017

Background/Objectives: Easy-to-use and accurate methods to assess free-living activity energy expenditure (AEE) in preschool children are required. The aims of this study in healthy preschool children were to (a) evaluate the ability of the wrist-worn ActiGraph wGT3x-BT to predict free-living AEE and (b) assess wear compliance using a 7...


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 ...


Validation of the Global Physical Activity Questionnaire for self-administration in a European context

  • Published on May 8, 2017

Background/Aim: Little is known about the measurement properties of the self-administered Global Physical Activity Questionnaire (GPAQ) in Europe. The aim was to validate the self-administered GPAQ against accelerometry in Switzerland in German, French and Italian. Methods: Participants of this cross-sectional study were recruited among members of the Swiss Food ...


Comparison of two accelerometers for measuring physical activity and sedentary behaviour

  • Published on May 12, 2017

Purpose: A central aspect of physical activity and sedentary behaviour research is accurate exposure assessment in the context of disease outcomes. The primary objectives of this study were to evaluate the convergent validity and test-retest reliability of the ActiGraph GT3X+ and activPAL3 accelerometers. Methods: Participants from the Breast Cancer ...


Accelerometer-based physical activity and sedentary behavior assessment in Brazilian military firefighters: the Brasilia Firefighters Study – BFS

  • Presented on Oct. 2017

Introduction: Firefighting is known to be a high cardiovascular risky activity, involving elevated physical and psychological demands. We hypothesized that during a routine 24-hour on-duty period firefighters combine physical activities of different intensities/durations with long periods of sedentary behavior. Purpose: To evaluate the physical activity level (PAL) and sedentary ...


Associations of Accelerometer-Measured and Self-Reported Sedentary Time With Leukocyte Telomere Length in Older Women

  • Published on Feb 1, 2017

Few studies have assessed the association of sedentary time with leukocyte telomere length (LTL). In a cross-sectional study conducted in 2012–2013, we examined associations of accelerometer-measured and self-reported sedentary time with LTL in a sample of 1,481 older white and African-American women from the Women's Health Initiative and determined whether associations ...


Validity of treadmill- and track-based individual calibration methods for estimating free-living walking speed and VO2 using the Actigraph accelerometer

  • Published on Nov 25, 2015

Background: For many patients clinical prescription of walking will be beneficial to health and accelerometers can be used to monitor their walking intensity, frequency and duration over many days. Walking intensity should include establishment of individual specific accelerometer count, walking speed and energy expenditure (VO2) relationships and this can be ...