Comparison of objective and subjective physical activity data for physical activity promotion
ISPAH ePoster Library. Namba H. Oct 16, 2018; 225432; 322
Hideyuki Namba
Hideyuki Namba
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Abstract
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Abstract Introduction:<\b>
Recently, wearable device health management systems have made remarkable progress. Measurement of physical activity has various methods according to purpose such as accelerometer, GPS or subjective evaluation. This research is to clarify the problem of measurement method from the viewpoint of compliance and validity. Methods:<\b>
Twelve healthy volunteers (18–21 years, 6 men and 6 women) participated in the study. All participants were recorded using a web-based physical activity measurement system (24WEB) over 1 week. At the same time, a wrist type GPS was attached and a triaxial accelerometer (ACC) was attached to the waist. Results:<\b>
The 24WEB had an input rate of 28.6% when the input condition was 70% or more a day. The ACC had an attachment rate of 27.1% when conditioned on wearing more than 10 hours a day. In the case of wearing at least 1 hour a day, it was 71.8% wearing rate. The wristwatch type GPS had an attachment rate of 84.4% when 500 steps or more a day. The correlation coefficient between the 24WEB and the ACC in energy consumption was r = 0.770 (p <0.01) for the wearing rate of 10 hours or more, but if wearing for 1 hour or longer, r = 0.514 (p <0.05). The correlation coefficient between the 24 WEB and the wrist type GPS was r = 0.506 (p <0.05). Conclusion:<\b>
It can be said that the reliability of subjective data and objective data is strongly affected by compliance in addition to measurement error.
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