Moderate physical activity does not raise risk of knee osteoarthritis

According to new research from the School of Medicine at the University of North Carolina (UNC) in Chapel Hill, adults ages 45 and older who engaged in moderate physical activity up to 2.5 hours a week did not increase their risk of developing knee osteoarthritis over a 6-year follow-up period. Study participants who engaged in the highest levels of physical activity—up to 5 hours a week—had a slightly higher risk of knee osteoarthritis, but the difference was not statistically significant, the study authors reported.