Sit up straight!! The best way to improve your posture is to focus on exercises that strengthen your core -- the abdominal and low back muscles that connect to your spine and pelvis. Proper posture is important for a number of reasons, including that it places your body in an alignment where the stress on supporting ligaments, tendons and muscles is limited. Poor posture can lead to discomfort and injury!! Try this key move: Core Stabilizer: Single Leg Extension Starting Position: Lie on your back with your knees bent, feet flat on the floor, and hands behind your head. Press your low back into the floor, and curl your head up off the floor. The Move: Exhale strongly and pull your navel in and up toward your spine. Slowly pull one knee into your chest, keeping your low back pressed to the floor, while extending your other leg straight at about a 45-degree angle off the floor. Keep your abdominals pulled in and your low back on the floor. If your low back arches off the floor, extend your leg higher toward the ceiling. Switch legs. Start with five to 10 extensions on each side. Increase the Intensity: Pull both knees into your chest, then extend both legs straight at about a 45-degree angle, using your core to keep your low back on the floor. Or, as you extend your legs, extend both arms overhead, reaching in the opposite direction from your legs.