How can I effectively perform scapular raises to strengthen my upper back and improve my posture?

To effectively perform scapular raises, start by lying face down on a mat with arms extended overhead. Keeping your arms straight, lift your shoulder blades towards the ceiling, squeezing your shoulder blades together. Hold for a few seconds, then lower back down. Repeat for several reps. This exercise helps strengthen the upper back muscles and improve posture by promoting proper shoulder alignment.