Grant Dale M, Tomlinson David J, Tsintzas Kostas, Onambele-Pearson Gladys L
Health & Exercise Medicine, Division of Public Health, Sport and Wellbeing, School of Allied and Public Health, Faculty of Medicine, Health and Society, Exton Park Campus, University of Chester, Parkgate Rd, Chester CH1 4BJ, UK.
Department of Sport & Exercise Sciences, Institute of Sport, Manchester Metropolitan University, Manchester M15 6BX, UK.
Sensors (Basel). 2025 Mar 30;25(7):2194. doi: 10.3390/s25072194.
Free-living physical behaviour (PB), from sedentarism through to vigorous physical activity (PA), is increasingly studied due to its links to health outcomes. However, it remains unclear whether pre-existing day-to-day regularity in certain PB patterns influences intervention responsiveness. Therefore, this study hypothesized that (1) inter-day variability in certain PBs would decrease following a sedentary behaviour (SB) reduction intervention, and (2) those with high inter-day variability (low regularity) at baseline would be less likely to alter their behaviour compared to those with low inter-day variability (high regularity). Thirty-six older women (73 ± 5 years) were allocated to one of three groups: (1) daily SB fragmentation (SBF) (n = 14), (2) single daily bout of continuous light-intensity PA/LIPA (n = 14), or (3) control (n = 8), where no instructions vis-à-vis altering daily physical activity or sedentary behaviour were given. PB was objectively assessed (weeks 0 and 8) using three-dimensional accelerometry. Participants (48% of the study sample) with high regularity at baseline (<25th sample percentile for SB and PA bout length), showed greater SB reduction, and increased average PA bout length ( < 0.05) at week 8. These findings suggest that baseline regularity in physical behaviour may enhance intervention responsiveness. This aligns with theories of habit formation and self-regulation, indicating that personalised interventions would benefit a wider range of populations.
从久坐不动到剧烈身体活动的自由生活身体行为（PB），因其与健康结果的关联而越来越受到研究。然而，目前尚不清楚某些PB模式中预先存在的日常规律性是否会影响干预反应性。因此，本研究假设：（1）在减少久坐行为（SB）干预后，某些PB的日间变异性会降低；（2）与日间变异性低（规律性高）的人相比，基线时日间变异性高（规律性低）的人改变行为的可能性较小。36名老年女性（73±5岁）被分配到三组中的一组：（1）每日SB碎片化（SBF）组（n = 14），（2）每日单次连续低强度身体活动/轻强度身体活动（LIPA）组（n = 14），或（3）对照组（n = 8），对照组未给予关于改变日常身体活动或久坐行为的指导。使用三维加速度计客观评估PB（第0周和第8周）。基线时规律性高的参与者（占研究样本的48%）（SB和PA发作时长低于第25个样本百分位数）在第8周时SB减少更多，平均PA发作时长增加（<0.05）。这些发现表明，身体行为的基线规律性可能会增强干预反应性。这与习惯形成和自我调节理论一致，表明个性化干预将使更广泛的人群受益。
