Cat/Cow can be practiced daily or whenever needed. Get on your hands and knees on a firm surface; inhale, let your head hang down and arch your back up like a cat; exhale, lift your head all the way up and let your spine return to parallel with the floor. Continue flexing the spine up and down while breathing rhythmically. This exercise can also be done in a standing position. Knee/Chest Twists stretch the spine and keep it supple. Once a day, or when needed, lie on your back on a firm surface and pull your knees to your chest. Stretch your arms straight out to the sides. Roll your knees to the left and your head to the right; relax for half a minute, then roll your knees to the right and your head to the left and relax again. Repeat once or twice.