Browsing Brage NIH by Author "van Hees, Vincent T."
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Comparability of accelerometer signal aggregation metrics across placements and dominant wrist cut points for the assessment of physical activity in adults
Migueles, Jairo H.; Cadenas-Sanchez, Cristina; Rowlands, Alex V.; Henriksson, Pontus; Shiroma, Eric; Acosta, Francisco M.; Rodriguez-Ayllon, Maria; Esteban-Cornejo, Irene; Plaza-Florido, Abel; Gil-Cosano, Jose J.; Ekelund, Ulf; van Hees, Vincent T.; Ortega, Francisco B. (Peer reviewed; Journal article, 2019)Large epidemiological studies that use accelerometers for physical behavior and sleep assessment difer in the location of the accelerometer attachment and the signal aggregation metric chosen. This study aimed to assess ... -
Objectively-measured physical activity in children is influenced by social indicators rather than biological lifecourse factors: Evidence from a Brazilian cohort
Knuth, Alan G.; Silva, Inacio Crochemore M.; van Hees, Vincent T.; Cordeira, Kelly; Matijasevich, Alicia; Barros, Aluisio J. D.; Santos, Ina S.; Ekelund, Ulf; Hallal, Pedro Curi (Journal article; Peer reviewed, 2017-04)The aim of this study was to examine the longitudinal influences of early life social and biological indicators on objectively measured physical activity. All newborns in 2004 in the city of Pelotas, Southern Brazil were ... -
Physical activity levels in three Brazilian birth cohorts as assessed with raw triaxial wrist accelerometry
Da Silva, Inacio C. M.; van Hees, Vincent T.; Ramires, Virgilio V.; Knuth, Alan G.; Bielemann, Renata M.; Ekelund, Ulf; Brage, Søren; Hallal, Pedro C. (Journal article; Peer reviewed, 2014-10-30)Background: Data on objectively measured physical activity are lacking in low- and middle-income countries. The aim of this study was to describe objectively measured overall physical activity and time spent in ... -
Separating movement and gravity components in an acceleration signal and implications for the assessment of human daily physical activity
van Hees, Vincent T.; Gorzelniak, Lukas; Leon, Emmanuel Carlos Dean; Eder, Martin; Pias, Marcelo; Taherian, Salman; Ekelund, Ulf; Renström, Frida; Franks, Paul W.; Horsch, Alexander; Brage, Søren (Journal article; Peer reviewed, 2013-04-23)Human body acceleration is often used as an indicator of daily physical activity in epidemiological research. Raw acceleration signals contain three basic components: movement, gravity, and noise. Separation of these becomes ...