Middle-aged men and women who engage in high levels of physical activity may be unknowingly causing damage to their knees and increasing their risk for osteoarthritis, according to a study presented today at the annual meeting of the Radiological Society of North America (RSNA)...

Middle-aged men and women who engage in high levels of physical activity may be unknowingly causing damage to their knees and increasing their risk for osteoarthritis, according to a study presented today at the annual meeting of the Radiological Society of North America (RSNA)...

A new study by radiologists found that middle-aged men and women who do lots of exercise, and particularly high impact activities like running and jumping, may be unknowingly causing damage to their knees and putting themselves at greater risk of developing osteoarthritis...

Obesity isn't the only negative side effect of excessive television watching. A new study from the American College of Sports Medicine suggests that young adults who tune in to two hours or more of TV per day have poor muscular fitness. Researchers Niko Paalanne and Tuija Tammelin of Finland studied more than 870 Finnish young men and women around 19 years of age. Subjects' muscular fitness was measured using trunk rotation, trunk flexion, press strength and jumping height.

Men and women become gradually less fit with age, with declines accelerating after age 45, according to a report in the October 26 issue of Archives of Internal Medicine, one of the JAMA/Archives journals. However, maintaining a healthy body mass index (BMI), not smoking and being physically active are associated with higher fitness levels throughout adult life. "The U.S.