Separating movement and gravity components in an acceleration signal and implications for the assessment of human daily physical activity
Journal article, Peer reviewed
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- Artikler / Articles 
Original versionPLoS ONE. 2013, 8, e61691 10.1371/journal.pone.0061691
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 increasingly difficult during rotational movements. We aimed to evaluate five different methods (metrics) of processing acceleration signals on their ability to remove the gravitational component of acceleration during standardised mechanical movements and the implications for human daily physical activity assessment.
© 2013 van Hees et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.