Aging population can do far less activity per week than recommended.
Older adults who suffer from arthritis need to keep moving to be functionally independent. But in an examination of a goal that is daunting for most of this aging population, a new Northwestern Medicine study found that performing even a third of the recommended activity is beneficial.
Federal guidelines suggest achieving 150 minutes of moderate activity per week to prevent premature death and serious illness, however only one in 10 older American adults with arthritis in their knees meet these guidelines. Northwestern Medicine researchers wanted to determine a less overwhelming activity goal to get this population up and moving, and 45 minutes per week was that magic number.
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Approximately one third of participants improved or had high function after two years. But those participants who achieved this minimum of 45 minutes of moderate activity, such as brisk walking, per week were 80 percent more likely to improve or sustain high future function over two years compared with those doing less. This finding was true for both men and women.
“Even a little activity is better than none,” said first author Dorothy Dunlop, professor of rheumatology and preventive medicine at Northwestern University Feinberg School of Medicine. “For those older people suffering from arthritis who are minimally active, a 45-minute minimum might feel more realistic.”
A rare examination of the type and intensity of physical activity older adults need to remain functional, the study was published online Dec. 28 in the journal Arthritis Care & Research.
Only one in 10 older adults with arthritis in their knees meet the federal guidelines of 150 minutes of moderate activity per week.