Brendon Stubbs1, Li-Jung Chen2, Chun-Yi Chang3, Wen-Jung Sun4, Po-Wen Ku5. 1. Physiotherapy Department, South London and Maudsley NHS Foundation Trust, Denmark Hill, London SE5 8AZ, UK; Health Service and Population Research Department, Institute of Psychiatry, Psychology and Neuroscience, King's College London, De Crespigny Park, London, Box SE5 8AF, UK; Faculty of Health, Social Care and Education, Anglia Ruskin University, Chelmsford, UK. Electronic address: brendon.stubbs@kcl.ac.uk. 2. Department of Exercise Health Science, National Taiwan University of Sport, Taiwan. Electronic address: ljchen@ntupes.edu.tw. 3. Department of Physical Education, National Tsing Hua University, Hsinchu, Taiwan. Electronic address: cjy@mail.nhcue.edu.tw. 4. Family Medicine Department, Taipei City Hospital Zhongxing Branch, Taiwan. Electronic address: das48@tpech.gov.tw. 5. Graduate Institute of Sports and Health, National Changhua University of Education, Taiwan. Electronic address: powen@cc.ncue.edu.tw.
Abstract
OBJECTIVE: Physical activity (PA), especially moderate-to-vigorous intensity, could protect older adults from cognitive impairment. However, most literature is based on self-reported PA which is limited by recall bias. Light PA is popular among older adults, but a paucity of objective longitudinal data has considered the relationship between light PA and cognitive ability. We examined if a higher level of objectively measured light PA, independent of moderate-to-vigorous physical activity (MVPA), was prospectively associated with better cognitive ability in older adults. METHODS: A longitudinal study over 22.12 (±1.46) months including 274 community-dwelling older adults across 14 regions in Taiwan was undertaken. Cognitive ability was obtained using a Chinese version of the Ascertain Dementia 8-item Questionnaire (AD8) and light PA and MVPA captured by 7days accelerometer positioned on waist. Multivariable negative binomial regression adjusted for confounders were undertaken. RESULTS: 274 participants (74.52years, 45.6% male) attended the follow-up (96.1%). Higher light PA, independent from MVPA, was associated with a reduced rate of decline in cognitive ability (rate ratio 0.75 [0.60-0.92]). MVPA, was also associated with a reduced decline in cognitive ability (rate ratio 0.85 [0.75-0.95]). Light PA was protective of cognitive ability in sensitivity analyses removing participants with activities of daily living difficulties, depressive symptoms and cognitive impairment at baseline. CONCLUSION: Our data suggest that light PA may offer a protective influence of future cognitive ability in community dwelling older adults. The promotion of light PA may be a valuable means to maintain cognitive ability in older age.
OBJECTIVE: Physical activity (PA), especially moderate-to-vigorous intensity, could protect older adults from cognitive impairment. However, most literature is based on self-reported PA which is limited by recall bias. Light PA is popular among older adults, but a paucity of objective longitudinal data has considered the relationship between light PA and cognitive ability. We examined if a higher level of objectively measured light PA, independent of moderate-to-vigorous physical activity (MVPA), was prospectively associated with better cognitive ability in older adults. METHODS: A longitudinal study over 22.12 (±1.46) months including 274 community-dwelling older adults across 14 regions in Taiwan was undertaken. Cognitive ability was obtained using a Chinese version of the Ascertain Dementia 8-item Questionnaire (AD8) and light PA and MVPA captured by 7days accelerometer positioned on waist. Multivariable negative binomial regression adjusted for confounders were undertaken. RESULTS: 274 participants (74.52years, 45.6% male) attended the follow-up (96.1%). Higher light PA, independent from MVPA, was associated with a reduced rate of decline in cognitive ability (rate ratio 0.75 [0.60-0.92]). MVPA, was also associated with a reduced decline in cognitive ability (rate ratio 0.85 [0.75-0.95]). Light PA was protective of cognitive ability in sensitivity analyses removing participants with activities of daily living difficulties, depressive symptoms and cognitive impairment at baseline. CONCLUSION: Our data suggest that light PA may offer a protective influence of future cognitive ability in community dwelling older adults. The promotion of light PA may be a valuable means to maintain cognitive ability in older age.
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