Abstract
The stair climbing test (SCT) is a standard geriatric assessment to measure lower-limb strength being one of the essential components of physical function. To detect functional decline as early as possible, regular assessments of mobility, balance, and strength are necessary. Inertial measurement units (IMU) are a promising technology for flexible and unobtrusive measurements of the SCTs. We introduce an automated assessment via IMUs in a study of 83 participants aged 70–87 (75.64 ± 4,17) years. The activity of stair ascending has been automatically classified via a k-nearest-neighbor classifier and the performance was evaluated regarding the power. Therefore, we considered both, stair climb average power and peak power. Stair ascending was correctly classified in 93% of the cases with a mean deviation of 2.35% of the average power value in comparison to conventional measurements. Additionally, we showed the medical sensitivity of our system regarding the detection of transitions towards the frail status in controlled conditions and also confirmed the general suitability of automated stair climb analyses in unsupervised home-assessments.
S. Fudickar, A. Hein—Contributed equally.
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Acknowledgements
The study is funded by the German Federal Ministry of Education and Research (Project No. 01EL1422D). The study has been approved by the appropriate ethics committee (ethical vote: Hannover Medical School No. 6948) and conducted in accordance with the Declaration of Helsinki.
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Hellmers, S. et al. (2019). Evaluation of Power-Based Stair Climb Performance via Inertial Measurement Units. In: Cliquet Jr., A., et al. Biomedical Engineering Systems and Technologies. BIOSTEC 2018. Communications in Computer and Information Science, vol 1024. Springer, Cham. https://doi.org/10.1007/978-3-030-29196-9_13
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DOI: https://doi.org/10.1007/978-3-030-29196-9_13
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