Associations Between Replacing Sedentary Time With Intensity-Specific Physical Activity and Physical Function in Older Adults

高齡者特定強度身體活動取代靜態時間與身體功能之關聯性

Yu-Huei Wang(王妤卉) ； Ming-Chun Hsueh(薛名淳) ； Ting-Fu Lai(賴鼎富) ； Yung Liao(廖邕) ； Jong-Hwan Park(朴鍾煥)

《大專體育學刊》 Volume 26 Issue 4 (2024/12) Pp. 370-382

https://doi.org/10.5297/ser.202412_26(4).0004

Abstracts

Lifestyle plays a crucial role in the decline of physical function. Daily activity time is a finite and physical activity (PA) that has varied health effects. However, the potential benefits of replacing sedentary time (ST) with light PA (LPA) or moderate-to-vigorous PA (MVPA) for older adults' physical function are poorly understood. Therefore, this study aims to examine the effects of replacing 10, 30, or 60-min of ST with LPA or MVPA on physical function indicators in older adults. A total of 204 adults from Taipei City, Taiwan aged ≥ 65 years were recruited. ST, LPA, and MVPA were objectively measured for seven days using triaxial accelerometers. Physical function was assessed through handgrip strength, 3-m timed-up-and-go, 6-m walking speed, and 5-time sit-to-stand tests. Results showed that: Directly replacing 10, 30, or 60-min of ST with LPA was significantly associated with different physical function indicators, while replacing any ST duration with MVPA was associated with 6-m walking speed and 5-time sit-to-stand. In conclusion: This study revealed that the practice of replacing ST with minimal LPA was positively associated with physical function improvement in older adults, while replacing ST with LPA is more beneficial than replacing ST with MVPA.

Keywords

accelerometer ； isotemporal substitution model ； timed-up-and-go test ； walking speed test ； sit-to-stand test

Parallel abstracts

生活方式在身體功能下降中扮演著至關重要的角色。鑑於每日活動時間有限，且身體活動對健康影響各異，高齡者以輕度身體活動或中高強度身體活動取代靜態時間對身體功能之關聯性尚不清楚。因此，本研究旨在探討高齡者以輕度身體活動或中高強度身體活動取代10、30或60分鐘的靜態時間對身體功能指標的影響。研究招募臺灣臺北市204位年齡≥65歲高齡者配戴7日三軸加速規測量每日靜態時間、輕度及中高強度身體活動時間，並以握力、三公尺起身來回行走、六公尺走路速度及五次坐站測試評估其身體功能。結果發現以10、30或60分鐘輕度身體活動取代靜態時間顯著與不同身體功能指標相關；而任何時間區段的中高強度身體活動取代靜態時間與六公尺走路速度及五次坐站時間有顯著相關。本研究發現高齡者以最小程度的輕度身體活動取代靜態時間與身體功能指標有正向的關聯性；而高齡者輕度身體活動取代靜態時間，相較於中高強度身體活動取代靜態時間，對身體功能有較佳之效益。

Parallel keywords

加速規 ； 時間取代模式 ； 起身來回行走測試 ； 走路速度測試 ； 坐站測試

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