-The best way to maintain a supple neck is by stretching and exercising it regularly. -Stretching and exercising your neck helps keep your muscles flexible and prevents stiffness and pain. -You can tell if your neck is supple if you can move it comfortably in all directions. -There are a few stretches and exercises you can do to maintain a supple neck. -To avoid neck pain, make sure to stretch and exercise your neck regularly.