Tokyo Research Laboratories, Kao Corporation, 2-1-3 Bunka, Sumida-ku, Tokyo, 131-8501, Japan.
Department of Preventive Gerontology, Center for Gerontology and Social Science, National Center for Geriatrics and Gerontology, 7-430 Morioka, Obu, Aichi, 474-8511, Japan.
Sci Rep. 2019 Mar 5;9(1):3496. doi: 10.1038/s41598-019-39695-0.
Gait speed in laboratory settings (in-laboratory gait speed) is one of the important indicators associated with the decline in functional abilities in older adulthood. Recently, it has become possible to measure gait speed during daily living (daily gait speed) using accelerometers. However, the relationship between these two gait speed parameters is unclear. This study aimed to compare in-laboratory gait speed, measured by a sheet-type pressure sensor, and daily gait speed, measured by an accelerometer, in healthy community-dwelling older adults. Participants were aged ≥60 years, residing in Takahama city, Aichi, Japan. To calculate daily gait speed, participants were instructed to wear a tri-axial accelerometer on their waist. A total of 1965 participants were included in the final analysis. The results showed a weak association (r = 0.333, p < 0.001) between the two gait speed parameters. Furthermore, average daily gait speed was significantly lower than average in-laboratory gait speed. However, both gait speed parameters declined significantly with age. These results suggest that, in addition to in-laboratory gait speed, daily gait speed may be a helpful parameter for predicting decline in functional abilities.
实验室环境中的步态速度（实验室步态速度）是与老年成年人功能能力下降相关的重要指标之一。最近，使用加速度计已经可以在日常生活中测量步态速度（日常步态速度）。然而，这两种步态速度参数之间的关系尚不清楚。本研究旨在比较使用片状压力传感器测量的实验室步态速度和使用加速度计测量的日常生活中的步态速度，研究对象为居住在日本爱知县高滨市的健康社区老年人。参与者年龄≥60 岁。为了计算日常步态速度，参与者被要求在腰部佩戴三轴加速度计。共有 1965 名参与者纳入最终分析。结果表明，两种步态速度参数之间存在弱相关性（r=0.333，p<0.001）。此外，日常步态速度的平均值明显低于实验室步态速度的平均值。然而，两种步态速度参数都随年龄显著下降。这些结果表明，除了实验室步态速度之外，日常步态速度可能是预测功能能力下降的有用参数。
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