Associating Gait Phase and Physical Fitness with Global Cognitive Function in the Aged
Department of Health Care and Science, College of Health Sciences, Dong-A University, Saha-gu, Busan 49315, Korea
Biomechanics Laboratory, College of Health Sciences, Dong-A University, Saha-gu, Busan 49315, Korea
Author to whom correspondence should be addressed.
Int. J. Environ. Res. Public Health 2020, 17(13), 4786; https://doi.org/10.3390/ijerph17134786
Received: 25 May 2020 / Revised: 1 July 2020 / Accepted: 1 July 2020 / Published: 3 July 2020
(This article belongs to the Special Issue Patterns of Physical Activity, Sedentary Behavior, and Sleep and Geriatric Diseases)
This study aimed to identify classifier variables by considering both gait and physical fitness for identifying adults aged over 75 years and global cognitive function declines in older adults. The participants included 735 adults aged 65–89 years who were asked to walk at three different speeds (slower, preferred, and faster) while wearing inertial measurement units embedded in shoe-type data loggers and to perform nine physical fitness tests. The variability in the stance phase as well as the strength, balance, and functional endurance showed a strong dependence on the age being over 75 years. The cognitive function was evaluated by the Mini-Mental State Examination; a longer stance phase at a slower walking speed and decreased grip strength and five times sit-to-stand were associated with cognitive function. These findings may be useful for determining the decline in physical performance of older adults. A longer stance phase and decreased grip strength and five times sit-to-stand may be factors that help distinguish declines in cognitive function from normal age-related declines.