Vigorous low-impact exercise
is beneficial – for your joints,
as well
as for cardiovascular, pulmonary, and other systems in your body.
If you can't do vigorous exercise, try walking, tai chi and yoga.
If you're overweight then you need to diet. Drink concentrated tart cherry juice. it contains anthocyanins and bioflavonoids, which help support a healthy immune response for your joints.
Make sure you're getting your vit. D, omega-3 fatty acids from krill or high quality fish oil.