An easy walk, slow dancing, leisurely sports such as table tennis, household chores, and other light-intensity exercise may be nearly as effective as moderate or vigorous exercise for older adults – if they get enough of that type of activity.
New research indicates that 300 minutes a week of light exercise provides some significant health benefits for people over age 65, said Dr. Brad Cardinal, a professor in the College of Public Health and Human Sciences at Oregon State University.
“You get a nice array of health benefits by doing five hours of light physical activity per week,” said Dr. Cardinal, who is a national expert on the benefits of physical activity and a co-author of the study. “There appears to be some real value in devoting at least three percent of the 168 hours available in a week to these light forms of physical activity.”
Current medical recommendations suggest that all adults engage in 150 minutes of moderate exercise each week. The researchers wanted to know whether exercise of less intensity, done more often, would produce similar health benefits.
Light exercise is more appealing to people over 65, and such activities do not generally require the approval of a physician, Dr. Cardinal said. Older adults, in particular, may be more reluctant to participate in moderate to vigorous exercise because of health concerns, including fear of injury.
The researchers examined data from the 2003-06 National Health and Nutrition Examination Survey, or NHANES, which is conducted by the National Center for Health Statistics and is a nationally representative sample of the U.S. population. The 2003-06 results are the only available cycles that use objectively measured physical activity data.
They found that older adults who participated in light intensity exercise activities for 300 minutes or more were 18 percent healthier, overall, than peers who did not log that much light activity. They had lower body mass index (BMI), smaller waist circumference, better insulin rates and were less likely to have chronic diseases, Dr. Cardinal said.