For one week, practice loving-kindness toward the body. Spend at least five or ten minutes a day with this practice. It could be during your meditation time. Sit down in a comfortable chair and breathe normally. On each in-breath, be aware of fresh oxygen and vital energy entering your body. On each out-breath, send this energy throughout your body along with these silent words: "May you be free from discomfort. May you be at ease, May you be healthy."
Eventually you can simplify this process by just saying "ease" with the out-breath. Any time during the day when your attention is drawn toward your body (when you see yourself in a mirror or when you feel discomfort), send loving-kindness to the body, even if only briefly.
— Jan Chozen Bays in How to Train a Wild Elephant and Other Adventures in Mindfulness