Fragmented Physical Activity Associated With Increased Risk of Mortality
Fragmented physical activity is activity that is less frequent
and shorter in duration. A new study has found an association between fragmented
daily activity and an increased risk of mortality.
Researchers from Johns Hopkins University used data from 548
adults participating in the Baltimore Longitudinal Study of Aging. Participants
wore accelerometers between 2007 and 2015 to track quantities and patterns of
physical activity. Mortality data was also collected for the same period.
More fragmented physical activity patterns were found to be associated with an increased risk of mortality. Each 10% higher activity fragmentation was associated with a 49% increase in the risk of mortality, compared to those with lower activity fragmentation. Engaging in activity bouts that lasted less than 5 minutes was especially associated with increased mortality risk, compared to those with activity bouts that lasted 10 minutes or longer. Each additional 10% of active time spent in bouts lasting less than 5 minutes was associated with a 28% increase in mortality risk.
The study was published on October 2, 2019 in the journal JAMA