Try the Standing External Rotation with Overhead Press exercise using a resistance band to improve your posture at home or in the gym. Hold a resistance band with handles in each hand, with thumbs pointing up, bringing your elbows out just below shoulder height and squeezing your shoulder blades together. Externally rotate your hands up into an overhead press position, maintaining a stable lower back. Perform an overhead press, engaging your core and keeping your back upright without excessive leaning. Hold for 4 seconds at the top, then lower your hands back to the starting position. Repeat this exercise 8-10 times to strengthen your posture muscles. Â