If you have RA, getting your heart pumping is essential. This is because those with RA are at a higher risk for cardiovascular diseases and complications. Biking is an excellent, low-impact exercise that’s easier on the joints than other aerobic exercises.Biking helps maintain cardiovascular health, increase leg strength, and reduce morning stiffness. You can bike outside, join a cycling group, or use a stationary bike at the gym or in your home.