Matthew Audia on Instagram: "Feeling shaky on your feet lately? It is a common concern as we get older, but the solution is simpler than you might think. Improve your stability in under one minute using just a doorway. This exercise combines single leg balance with gentle spinal mobility to help you stop leaning to one side and reduce overall stiffness. By standing on one leg and reaching your arm up and over, you activate your hip and side muscles to stabilize your whole body. Why This Move Wor