Key result
An hourly increase in light-intensity physical activity was associated with a 0.09 mm reduction in popliteal intima-media thickness, suggesting cardiovascular benefits without moderate-vigorous engagement.
Why the study?
Do patterns of sedentary behavior and physical activity predict cardiovascular structure and function in older adults?
Cross-Sectional (n=93)
No
Do patterns of sedentary behavior and physical activity predict cardiovascular structure and function in older adults?
Mean Difference: -0.09 (95% CI -0.15–-0.03)
p-value: p=0.004
Patterns of physical behavior, particularly standing and light-intensity physical activity, are robust predictors of cardiovascular parameters like popliteal intima-media thickness in older adults, suggesting health benefits can be obtained without moderate-vigorous physical activity.
Light PA may benefit vascular health in older adults; leaves open causality and requires prospective trials before practice change.
Background : Physical behavior [PB, physical activity (PA), and sedentary behavior (SB)] can adjust cardiovascular mortality risk in older adults. The aim of this study was to predict cardiovascular parameters (CVPs) using 21 parameters of PB. Methods : Participants [ n = 93, 73.8 (6.23) y] wore a thigh-mounted accelerometer for 7 days. Phenotype of the carotid, brachial, and popliteal arteries was conducted using ultrasound. Results : Sedentary behavior was associated with one of the 19 CVPs. Standing and light-intensity PA was associated with 3 and 1 CVP, respectively. Our prediction model suggested that an hourly increase in light-intensity PA would be negatively associated with popliteal intima-media thickness [0.09 mm (95% confidence interval, 0.15 to 0.03)]. sMVPA [moderate–vigorous PA (MVPA), accumulated in bouts <10 min] was associated with 1 CVP. 10 MVPA (MVPA accumulated in bouts ≥10 min) had no associations. W50% had associations with 3 CVP. SB%, alpha, true mean PA bout, daily sum of PA bout time, and total week 10 MVPA each were associated with 2 CVP. Conclusions : Patterns of PB are more robust predictors of CVP than PB (hours per day). The prediction that popliteal intima-media thickness would be negatively associated with increased standing and light-intensity PA engagement suggests that older adults could obtain health benefits without MVPA engagement.
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Ryan et al. (2018) conducted a cross-sectional in Healthy older adults (n=93). Light-intensity physical activity (LIPA) was evaluated on Popliteal intima-media thickness (IMT) (MD -0.09 mm, 95% CI -0.15 to -0.03, p=0.004). An hourly increase in light-intensity physical activity was associated with a 0.09 mm reduction in popliteal intima-media thickness, suggesting cardiovascular benefits without moderate-vigorous engagement.
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