Slightly altering your stride while walking could considerably ease pain caused by wear-and-tear knee arthritis , a new study says. Foot positioning while walking can reduce stress on a person's knee joint, researchers reported Tuesday in The Lancet Rheumatology . People trained to angle their feet slightly inward or outward from their natural alignment experienced slower degeneration of the cartilage cushion inside their aching knees, results show. They also reported greater reductions in knee