Movement: Pack your shoulder blades tightly together and brace your core. Grasp two gymnastic rings, and with feet on the floor and a neutral spine slowly extend the rings away from your body. Stay tight and do not allow your lumbar spine to extend or the hips to sag or flare up. Set the height of the rings higher to make the exercise easier, lower to make it more challenging. If you're particularly strong you may incline your feet or use a weight vest.
Benefits: The ring rollout is a great exercise for building high levels of core stability as well as muscle mass in the abdominals. Compared to traditional rollouts, it allows for greater control of your own path of movement as well as difficulty (via ring height), and doesn't restrict the shoulders to a very narrow, pronated grip as required with ab wheels.