Adherence
Higher volumes of accelerometer-assessed total physical activity and moderate-to-vigorous physical activity (MVPA) are strongly and inversely associated with all-cause mortality in older women, whereas light-intensity physical activity (LPA) and sedentary behavior show no significant independent associations with mortality after adjusting for MVPA.
For older women, the most effective way to reduce mortality risk is to engage in moderate-to-vigorous physical activity (MVPA). This study found that those in the highest quartile of MVPA (median 68 minutes/day) had significantly lower mortality rates compared to those with the least MVPA (median 8 minutes/day). While light activity and reducing sedentary time are beneficial, their independent impact on mortality disappears when MVPA is accounted for. Focus on getting your heart rate up for moderate periods daily.
The strong inverse association for overall volume of activity was primarily attributable to the strong inverse relation between MVPA and mortality; we did not find any associations of LPA or sedentary behavior with mortality after accounting for MVPA participation.
Why this rating
Large cohort (n=16,741), objective measurement via accelerometers, long-term follow-up, but relatively short observation period (2.3 years) and specific demographic (older white women).
Source
Using Devices to Assess Physical Activity and Sedentary Behavior in a Large Cohort Study: The Women’s Health Study
I‐Min Lee et al. · Journal for the Measurement of Physical Behaviour · 2018
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