Physical activity & exercise can improve pain severity & physical function, and consequent quality of life.
Geneen LJ, Moore RA, Clarke C, Martin D, Colvin LA, Smith BH. Physical activity and exercise for chronic pain in adults: an overview of Cochrane Reviews. Cochrane Database Syst Rev. 2017 Jan 14;1:CD011279. doi: 10.1002/14651858.CD011279.pub2.