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Poitras, Isabelle

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Poitras

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Isabelle

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Département de réadaptation, Faculté de médecine, Université Laval

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  • PublicationAccès libre
    Development and validation of open-source activity intensity count and activity intensity classification algorithms from raw acceleration signals of wearable sensors
    (Basel MDPI, 2020-11-26) Mercier, Catherine; Clouâtre, Jade; Routhier, François; Poitras, Isabelle; Campeau-Lecours, Alexandre; Bouyer, Laurent
    Background: A popular outcome in rehabilitation studies is the activity intensity count, which is typically measured from commercially available accelerometers. However, the algorithms are not openly available, which impairs long-term follow-ups and restricts the potential to adapt the algorithms for pathological populations. The objectives of this research are to design and validate open-source algorithms for activity intensity quantification and classification. Methods: Two versions of a quantification algorithm are proposed (fixed [FB] and modifiable bandwidth [MB]) along with two versions of a classification algorithm (discrete [DM] vs. continuous methods [CM]). The results of these algorithms were compared to those of a commercial activity intensity count solution (ActiLife) with datasets from four activities (n = 24 participants). Results: The FB and MB algorithms gave similar results as ActiLife (r > 0.96). The DM algorithm is similar to a ActiLife (r ≥ 0.99). The CM algorithm differs (r ≥ 0.89) but is more precise. Conclusion: The combination of the FB algorithm with the DM results is a solution close to that of ActiLife. However, the MB version remains valid while being more adaptable, and the CM is more precise. This paper proposes an open-source alternative for rehabilitation that is compatible with several wearable devices and not dependent on manufacturer commercial decisions.