Today's exercise, called Stretch and Release the Bows, is a great technique for anyone to use. It helps keep the lower back healthy, it improves posture, it improves hip stability, relaxes the shoulders and chest, and much more. Use this technique when doing all your Tai Chi forms to see even greater results.
If you are having severe Upper Back or Lower Back problems, consider looking at the courses I designed to deal with those issues as well. Stretching and Releasing the Bows is a technique you will use in both mind-body prescriptions.