Break long car rides into small, 1- to 2-hour chunks. If you’re in the car too long, you may get stiff, which can lead to pain. Make stops along the way to get out, stretch, and walk around. When you drive, prop your arm on a pillow for support. Bring a second driver so you can take turns behind the wheel. When you’re not driving, push your seat back for more legroom. Or sit in the back seat and put up your feet.