When your joints ache, you might not feel like going for a brisk walk or swimming laps. Try your best to do something, anyway. Being active is especially good for people with rheumatoid arthritis. It eases pain, improves mood, lowers stress, and helps keep joints mobile. Go for cardio (aerobic exercise). Pick activities that are easy on your joints, like swimming and walking. Also do strength training. You can use light weights, machines at the gym, resistance bands, or your own body weight (think push-ups and lunges). Don’t forget flexibility. Tai chi and gentle types of yoga are good for that. They can also be relaxing. If you’re not active now, ask your doctor what’s okay for you to do.