Department of Mechanical Engineering, University of Central Florida, Orlando, FL 32816, USA.
Disability, Aging and Technology Cluster, University of Central Florida, Orlando, FL 32816, USA.
Int J Environ Res Public Health. 2023 Feb 17;20(4):3595. doi: 10.3390/ijerph20043595.
The individual effects of physical activity (PA) and sedentary behavior (SB) on health are well-recognized. However, little is known about the extent to which different combinations of these behaviors are associated with body composition and fall risk in older adults. This cross-sectional study examined the associations of mutually exclusive categories of PA and SB with body composition and fall risk in older women. Accelerometer-measured PA, body composition and fall risk (static and dynamic balance) parameters were assessed among 94 community-dwelling older women. The participants were categorized into four groups: active-low sedentary, active-high sedentary, inactive-low sedentary and inactive-high sedentary (active: ≥150 min/week moderate-to-vigorous PA (MVPA); low sedentary: lowest tertile of SB and light PA ratio). Compared to the inactive-high sedentary group, more favorable body composition and dynamic balance results were found in the active-low sedentary (body fat mass index (BFMI): = -4.37, = 0.002; skeletal muscle mass index (SMI): = 1.23, = 0.017; appendicular lean mass index (ALMI): = 1.89, = 0.003; appendicular fat mass index (AFMI): = -2.19, = 0.003; sit-to-stand: = 4.52, = 0.014) and inactive-low sedentary (BFMI: = -3.14, = 0.007; SMI: = 1.05, = 0.014; AFMI: = -1.74, = 0.005, sit-to-stand: = 3.28, = 0.034) groups. Our results suggest that PA programs focusing on concurrently achieving sufficient MVPA and reduced SB might promote a healthy body composition and reduced fall risk among older adults.
体力活动（PA）和久坐行为（SB）对健康的个体影响已得到充分认识。然而，对于这些行为的不同组合与老年人身体成分和跌倒风险之间的关联程度，我们知之甚少。本横断面研究检查了不同 PA 和 SB 分类与老年女性身体成分和跌倒风险（静态和动态平衡）之间的关联。在 94 名社区居住的老年女性中评估了加速度计测量的 PA、身体成分和跌倒风险（静态和动态平衡）参数。参与者被分为四组：活跃低久坐、活跃高久坐、不活跃低久坐和不活跃高久坐（活跃：≥150 分钟/周中高强度 PA（MVPA）；低久坐：SB 和轻 PA 比值最低三分位）。与不活跃高久坐组相比，活跃低久坐组（体脂肪质量指数（BFMI）：= -4.37，= 0.002；骨骼肌质量指数（SMI）：= 1.23，= 0.017；四肢瘦体重指数（ALMI）：= 1.89，= 0.003；四肢脂肪质量指数（AFMI）：= -2.19，= 0.003；从座位到站立：= 4.52，= 0.014）和不活跃低久坐组（BFMI：= -3.14，= 0.007；SMI：= 1.05，= 0.014；AFMI：= -1.74，= 0.005；从座位到站立：= 3.28，= 0.034）具有更有利的身体成分和动态平衡结果。我们的结果表明，专注于同时实现足够的 MVPA 和减少 SB 的 PA 计划可能会促进老年人的健康身体成分和降低跌倒风险。
