Just 5 to 10 minutes a day seems to bring benefits, study says
By Dennis Thompson
MONDAY, July 28, 2014 (HealthDay News) -- Runners may live an average three years longer than people who don't run, according to new research.
But, the best news from this study is that it appears that you can reap this benefit even if you run at slow speeds for mere minutes every day, the 15-year study suggests.
"People may not need to run a lot to get health benefits," said lead author Duck-chul Lee, an assistant professor of kinesiology at Iowa State University. "I hope this study can motivate more people to start running and to continue running as an attainable health goal."
It's not clear from the study whether the longer lifespan is directly caused by running. The researchers were only able to prove a strong link between running and living longer. There could be other reasons that runners live longer. It could be that healthy people are the ones who choose to run, noted the study's authors. The investigators did try to control the data to account for such factors though.
Current U.S. guidelines for physical activity call for a minimum of 75 minutes per week of running or other vigorous-intensity aerobic activity, or 30 minutes of moderate-intensity exercise most days of the week.
But people who exercised less than that still received significant health benefits, according to the new research.
Running modest amounts each week -- less than 51 minutes, fewer than 6 miles, slower than 6 miles per hour, or only one to two times -- was still associated with solid health benefits compared to no running, the researchers reported in the Aug. 5 issue of the Journal of the American College of Cardiology.
The study also suggested that you can have too much of a good thing. People who regularly ran less than an hour per week reduced their risk of death just as much as runners who logged three hours or more weekly.
The study involved more than 55,000 adults aged 18 to 100, who were followed during a 15-year period to determine whether there is a relationship between running and longevity. About one quarter of this group were runners.