Research

Accelerometry

ActivPAL algorithm

To automatically identify waking time in 24-hour activPAL data, we have developed an algorithm written in MATLAB. This algorithm identifies wake and bed times in 24-hour activPAL data on an individual level on multiple days (i.e., different wake and bed times, for each day, for each participant). 
A description of the algorithm and its accuracy has been described in:

-          van der Berg JD, Willems PJB, van der Velde JHPM, Savelberg HHCM, Schaper NC, Schram MT, et al. Identifying waking time in 24-h accelerometry data in adults using an automated algorithm. Journal of Sports Sciences. 2016;2:1–7. http://www.tandfonline.com/doi/full/10.1080/02640414.2016.1140908

Researchers who would like to use our algorithm can download the MATLAB files via the download links, which are provided below. Also a manual of the algorithm as well as a dictionary of the estimated parameters are available for download.

For questions or suggestions to improve our algorithm, please contact Annemarie Koster:

Annemarie Koster, PhD.
P.O. Box 616 – 6200 MD Maastricht – the Netherlands
Telephone: 0031 43 388 2265
Email: a.koster@maastrichtuniversity.nl

Download algorithm: Algorithm

Download dictionairy: VariablesMATLAB