Is sedentary lifestyle a risk factor for premature death?



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ANI |
Updated:
March 26, 2019 3:28 PM IST

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– Rajat Sharma

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Washington DC. [USA], March 26 (ANI): New research has found that a sedentary lifestyle may be a risk factor for early mortality.
For those who receive the least amount of physical activity, the replacement of half an hour of physical activity per physical activity was associated with a reduction of almost 50% in mortality.
The study appeared in the American Journal of Preventive Medicine, suggested that replacing modest amount of session time even with mild physical activity may have the potential to reduce the risk of premature death among less active adults.
Mild to moderate to vigorous physical activity (MVAM) is associated with a lower risk of cardiovascular disease; certain cancers; and premature death.
In addition, the amount of time spent sedentary is associated with an increased risk of death and illness. This may result, at least in part, from the shift of physical activity to sedentary behavior.
Most previous studies have explored the potential effect of sedentary time without considering the physical activity it moves, leaving a gap in understanding the issue.
To further explore, researchers led by Erika Rees-Punia, PhD, examined self-reported session time, light physical activity and moderate / vigorous physical activity among 92,541 participants in the Nutrition Cohort Prevention II of the Cancer Prevention Study.
The analysis reviewed sedentary time and activity levels over 14 years. It was found that among the less active participants (≤17minutes / day of MVAP), replacing 30 minutes / day of sitting with mild physical activity was associated with a 14 percent reduced risk of death, while replacement with moderate to vigorous physical activity was associated with 45 percent reduced risk of death.
Researchers found similar but smaller associations among moderately active participants: replacing a half hour of sedentary time with mild physical activity was associated with a 6% reduction in mortality among those who were moderately active; Replacing 30 minutes of sitting time with moderate to vigorous physical activity was associated with a 17 percent mortality reduction in this group.
However, for the more active (> 38 minutes / day AFMV), the replacement of sitting time by mild physical activity or MVAP was not associated with a reduction in mortality risk.
Participants who reported more moderate / vigorous physical activity were leaner, more educated, and less likely to be current smokers. For all participants, the waiting time included mainly watch TV (39%) and read (20%).
The study had some limitations: it counted with self-reported physical activity and session time; lacked information about certain activities of daily living (eg, cleanliness, self-care, cooking) that are particularly common for older adults. And participants were predominantly white and educated, so they may not represent the general US population.
"These results suggest that replacing modest amounts of session time, even with mild physical activity, may have the potential to reduce the risk of premature death among less active adults," the authors concluded. (ANI)

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