Blar i Brage NIH på forfatter "Brønd, Jan Christian"
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A new approach to define and diagnose cardiometabolic disorder in children
Andersen, Lars Bo; Lauersen, Jeppe Bo; Brønd, Jan Christian; Anderssen, Sigmund A.; Sardinha, Luis B.; Steene-Johannessen, Jostein; McMurray, Robert G.; Barros, Mauro V. G.; Kriemler, Susi; Møller, Niels Christian; Bugge, Anna; Kristensen, Peter Lund; Ried-Larsen, Mathias; Grøntved, Anders; Ekelund, Ulf (Journal article; Peer reviewed, 2015)The aim of the study was to test the performance of a new definition of metabolic syndrome (MetS), which better describes metabolic dysfunction in children. Methods. 15,794 youths aged 6–18 years participated. Mean z-score ... -
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. ... -
Mechanical and free living comparisons of four generations of the Actigraph activity monitor
Ried-Larsen, Mathias; Brønd, Jan Christian; Brage, Søren; Hansen, Bjørge Herman; Grydeland, May; Andersen, Lars Bo; Møller, Niels C. (Journal article; Peer reviewed, 2012-09-12)Background More studies include multiple generations of the Actigraph activity monitor. So far no studies have compared the output including the newest generation and investigated the impact on the output of the activity ... -
Physical activity, sedentary behavior, and long-term cardiovascular risk in young people: A review and discussion of methodology in prospective studies
Tarp, Jakob; Brønd, Jan Christian; Andersen, Lars Bo; Møller, Niels Christian; Froberg, Karsten; Grøntvedt, Anders (Journal article; Peer reviewed, 2016-06)The long-term effects of physical activity (PA) or sedentary behavior on cardiovascular health in young people are not well understood. In this study, we use a narrative format to review the evidence for a prospective ... -
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 ... -
Recommendations for determining the validity of consumer wearable and smartphone step count: Expert statement and checklist of the INTERLIVE network
Johnston, William; Júdice, Pedro B.; Molina-Garcia, Pablo; Lykke Skovgaard, Esben; Stang, Julie; Schumann, Moritz; Cheng, Shulin; Bloch, Wilhelm; Brønd, Jan Christian; Ekelund, Ulf; Grøntved, Anders; Caulfield, Brian; Ortega, Francisco B.; Sardinha, Luís B.; Mühlen, Jan M. (Peer reviewed; Journal article, 2020)Consumer wearable and smartphone devices provide an accessible means to objectively measure physical activity (PA) through step counts. With the increasing proliferation of this technology, consumers, practitioners and ... -
Recommendations for determining the validity of consumer wearable heart rate devices: Expert statement and checklist of the INTERLIVE Network
Mühlen, Jan M.; Stang, Julie; Júdice, Pedro B.; Molina-Garcia, Pablo; Johnston, William; Sardinha, Luís B.; Ortega, Francisco B.; Caulfield, Brian; Bloch, Wilhelm; Cheng, Sulin; Ekelund, Ulf; Brønd, Jan Christian; Grøntved, Anders; Schumann, Moritz; Skovgaard, Esben Lykke (Peer reviewed; Journal article, 2021)Assessing vital signs such as heart rate (HR) by wearable devices in a lifestyle-related environment provides widespread opportunities for public health related research and applications. Commonly, consumer wearable devices ... -
Recommendations for determining the validity of consumer wearables and smartphones for the estimation of energy expenditure: Expert statement and checklist of the INTERLIVE network
Argent, Rob; Hetherington-Rauth, Megan; Tarp, Jakob; Ortega, Francisco B.; Molina-Garcia, Pablo; Schumann, Moritz; Bloch, Wilhelm; Cheng, Sulin; Grøntved, Anders; Brønd, Jan Christian; Ekelund, Ulf; Sardinha, Luis B.; Caulfield, Brian; Stang, Julie Sørbø (Peer reviewed; Journal article, 2022)Background: Consumer wearables and smartphone devices commonly offer an estimate of energy expenditure (EE) to assist in the objective monitoring of physical activity to the general population. Alongside consumers, healthcare ... -
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. ... -
Validity of estimating the maximal oxygen consumption by consumer wearables: A systematic review with meta-analysis and expert statement of the INTERLIVE network
Molina-Garcia, Pablo; Notbohm, Hannah L.; Schumann, Moritz; Argent, Rob; Hetherington-Rauth, Megan; Stang, Julie; Bloch, Wilhelm; Cheng, Sulin; Ekelund, Ulf; Sardinha, Luis B.; Caulfield, Brian; Brønd, Jan Christian; Grøntved, Anders; Ortega, Francisco B. (Peer reviewed; Journal article, 2022)Background: Technological advances have recently made possible the estimation of maximal oxygen consumption (VO2max) by consumer wearables. However, the validity of such estimations has not been systematically summarized ...