Lying down, roll your pelvis and shoulders in opposite directions, back and forth. Supine lumbar twists are really pleasant, almost luxurious.
This is a especially satisfying mobilization found in various forms in many different exercise traditions, especially yoga. Lie down face up. Roll your pelvis and legs to one side, using the weight off the top leg to twist your lower body one way, while your upper body remains relatively fixed on the ground. Experiment with positioning. You will mainly notice a deep torquing of the spine and deep stretches in the hips. Go back and forth slowly but steadily.
Good for …