Osteoarthritis knee pain commonly afflicts retired professional athletes but also those who are obese. A simple solution to the problem may exist, however, according to a new study: lose weight.

Having flat feet is associated with chronic knee pain, or knee osteoarthritis, in older adults, a recent study finds.

Osteoarthritis sufferers are able to move faster and with more ease if they lead physically active lives, according to new research from Northwestern University Feinberg School of Medicine.

"Flat-footed" older adults may be more likely to experience chronic knee pain than their peers who have higher arches, according to a new study from Boston University School of Medicine.

A team of researchers at the University of Missouri have successfully regenerated complete shoulder joint surfaces using a patient’s own cells.