Blar i HVL Open på forfatter "Brønd, Jan Christian"
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The ActiGraph counts processing and the assessment of vigorous activity
Brønd, Jan Christian; Aadland, Eivind; Andersen, Lars Bo; Resaland, Geir Kåre; Anderssen, Sigmund Alfred; Arvidsson, Daniel (Peer reviewed; Journal article, 2019)The purpose of this study was to investigate the effect of different band‐pass filters on the measurement bias with ActiGraph counts during high speed running and for estimating free‐living vigorous physical activity (VPA). ... -
Generating actiGraph counts from raw acceleration recorded by an alternative monitor
Brønd, Jan Christian; Andersen, Lars Bo; Arvidsson, Daniel (Journal article; Peer reviewed, 2017)Purpose: This study aimed to implement an aggregation method in Matlab for generating ActiGraph counts from raw acceleration recorded with an alternative accelerometer device and to investigate the validity of the method. ... -
GRANADA consensus on analytical approaches to assess associations with accelerometer-determined physical behaviours (physical activity, sedentary behaviour and sleep) in epidemiological studies
Migueles, Jairo H.; Aadland, Eivind; Andersen, Lars Bo; Brønd, Jan Christian; Chastin, Sebastien; Hansen, Bjørge Hermann; Konstabel, Kenn; Kvalheim, Olav Martin; McGregor, Duncan E.; Rowlands, Alex V.; Sabia, Séverine; van Hees, Vincent T.; Walmsley, Rosemary; Ortega, Francisco B. (Peer reviewed; Journal article, 2021)The inter-relationship between physical activity, sedentary behaviour and sleep (collectively defined as physical behaviours) is of interest to researchers from different fields. Each of these physical behaviours has been ... -
Re-examination of accelerometer data processing and calibration for the assessment of physical activity intensity
Arvidsson, Daniel; Fridolfsson, Jonatan; Börjesson, Mats; Andersen, Lars Bo; Ekblom, Örjan; Dencker, Magnus; Brønd, Jan Christian (Peer reviewed; Journal article, 2019)This review re‐examines the use of accelerometer and oxygen uptake data for the assessment of activity intensity. Accelerometers capture mechanical work, while oxygen uptake captures the energy cost of this work. Frequency ... -
Resemblance in accelerometer-assessed physical activity in families with children: The Lolland-Falster Health Study
Petersen, Therese L; Brønd, Jan Christian; Kristensen, Peter Lund; Aadland, Eivind; Grøntved, Anders; Jepsen, Randi (Peer reviewed; Journal article, 2020)Background Evidence of intra-family resemblance in physical activity (PA) is lacking. The association between parent and child PA appears weak, the influence of age and gender on this association is uncertain, and no ... -
Resemblance in Physical Activity in Families with Children in Time Segments during the Week: The Lolland-Falster Health Study
Petersen, Therese Lockenwitz; Brønd, Jan Christian; Kristensen, Peter Lund; Aadland, Eivind; Grøntved, Anders; Jepsen, Randi (Peer reviewed; Journal article, 2021)Purpose Evidence of shared physical activity (PA) habits within families is inconsistent. The present study aimed at examining intrafamily resemblance in PA during different time segments of the week. Method This ... -
Simple Method for the Objective Activity Type Assessment with Preschoolers, Children and Adolescents
Brønd, Jan Christian; Grøntved, Anders; Andersen, Lars Bo; Arvidsson, Daniel; Olesen, Line Grønholt (Peer reviewed; Journal article, 2020)Background: The objective and accurate assessment of children’s sedentary and physical behavior is important for investigating their relation to health. The purpose of this study is to validate a simple and robust method ... -
Validation of SenseWear Armband in children, adolescents, and adults
Lopez, Garcia; Brønd, Jan Christian; Andersen, Lars Bo; Dencker, Magnus; Arvidsson, Daniel (Journal article; Peer reviewed, 2017)SenseWear Armband (SW) is a multisensor monitor to assess physical activity and energy expenditure. Its prediction algorithms have been updated periodically. The aim was to validate SW in children, adolescents, and adults. ...