Walking might be good for your knees, even if you have arthritis. In a new study published in the journal Arthritis & Rheumatology, researchers at Baylor College of Medicine in Houston surveyed over 1,000 people ages 50 or older with knee osteoarthritis and followed them for four years. Of the patients who did not walk for exercise, almost 4 in 10 developed new, frequent knee pain. Only 26 percent of arthritis patients who did regularly walk for exercise developed new aches and pains in their knees, and they had less structural damage. Over 32 million adults in this country have osteoarthritis. For years, many orthopedic surgeons have discouraged patients with osteoarthritis from impact exercise, like jogging and walking, and instead recommended non-weight-bearing exercise. This study offers a simple remedy, as walking is easy to do, and it’s free.