n this paper, the idea of a modular activity monitoring system is introduced. By using different combinations of the system’s three modules, different functionality becomes available: 1) a coarse intensity estimation of physical activities 2) different features based on HR-data and 3) the recognition of basic activities and postures. 3D-accelerometers – placed on lower arm, chest and foot – and a heart rate monitor were used as sensors. A dataset with 8 subjects and 14 different activities was recorded to evaluate the performance of the system. The overall performance on the intensity estimation task, relying on the chest-worn accelerometer and the HR-monitor, was 94.37%. The overall performance on the activity recognition task, using all three accelerometer placements and the HR-monitor, was 90.65%. This paper also gives an analysis of the importance of different accelerometer placements and the importance of a HR-monitor for both tasks.

Direct Link: https://doi.org/10.1109/IEMBS.2011.6091360

Journal: in 2011 Annual International Conference of the IEEE Engineering in Medicine and Biology Society 2011 Aug 30 (pp. 5621-5624)

Keywords: activity recognition, Heart Rate, Physical Activity,

Applications: Physical Activity,

CamNtech Reference: AH11044

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