Development of A New Accelerometer-Based Physical Activity-Monitoring System Using A High-Frequency Sampling Rate
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- Kitamura Kei-ichiro
- Department of Clinical Laboratory Science, Graduate School of Medical Science, Kanazawa University, Kodatsuno, Kanazawa, Ishikawa 920-0942, Japan
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- Nemoto Tetsu
- Department of Clinical Laboratory Science, Graduate School of Medical Science, Kanazawa University, Kodatsuno, Kanazawa, Ishikawa 920-0942, Japan
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- Sato Nobutoshi
- Department of Clinical Laboratory Science, Graduate School of Medical Science, Kanazawa University, Kodatsuno, Kanazawa, Ishikawa 920-0942, Japan
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- Chen Wenxi
- School and Graduate School of Computer Science and Engineering, University of Aizu, Aizu-Wakamatsu, Fukushima 965-8580, Japan
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Physical activity is known to enhance the mechanical competence of weight-bearing bones, and it is also effective for the prevention of osteoporosis. However, little information is available regarding the optimum exercise and intensity of load to weight-bearing bones as well as about a precise system to monitor the intensity of physical activity. To measure the precise load to weight-bearing bones of exercise as a first step, this study is to evaluate the sampling conditions of data acquisition and develop an accelerometer-based physical activity monitoring and its intensity analysis system. Through a simulation experiment, we found that 1k Hz of sampling rate is possible to achieve a measurement error of less than 2%. With the optimum sampling rate of 1k Hz, we developed an accelerometer-based activity-monitoring system. We then assessed the magnitude of acceleration at the shank, knee, and lumber in healthy subjects (n=19) as they descended stairs. A correlation analysis of the precise acceleration values in three points of the body showed that our system could accurately identify the shock absorptive function of lower extremities. Therefore, we strongly believe that our system, with the optimum sampling rate of 1k Hz, produced an accurate measurement of loads acting on weight-bearing bones.
収録刊行物
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- Biological Sciences in Space
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Biological Sciences in Space 23 (2), 77-83, 2009
日本宇宙生物科学会
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詳細情報 詳細情報について
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- CRID
- 1390001204433057536
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- NII論文ID
- 130004450603
- 10025544644
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- NII書誌ID
- AN10164806
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- ISSN
- 1349967X
- 09149201
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- NDL書誌ID
- 10430868
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
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