Start on all fours on the floor. Make sure your knees are under your hips and your wrists are under your shoulders.
Exhale and round your spine up toward the ceiling, tucking your butt and imagining you're pulling your belly button up toward your spine. Tuck your chin toward your chest, and let your neck release. This is Cat. Hold for five to 10 seconds.
On your inhale, arch your back, and let your belly relax and go loose. Gently lift your head and tailbone up toward the sky. This is Cow. Hold for five to 10 seconds.
Continue flowing back and forth from Cat Pose to Cow Pose, matching your movement with your breath.