If you have knee osteoarthritis, you may have been told to strengthen your muscles, stretch regularly, and work on your balance. Paying attention to how you walk — what’s called your gait — may not get as much attention, but perhaps it should. “When someone with knee osteoarthritis comes to see me, there are four areas I focus on: strengthening, stretching, balance, and gait training,” says Whitney Rokui, a physical therapist at Harvard-affiliated Spaulding Rehabilitation. Why walking patterns