How can I properly execute a pullup shrug to target my upper back muscles effectively?

To properly execute a pullup shrug to target your upper back muscles effectively, start by hanging from a pull-up bar with your hands shoulder-width apart. Pull yourself up until your chin is above the bar, then shrug your shoulders towards your ears while keeping your arms straight. Lower yourself back down and repeat the movement for a complete set. This exercise helps to engage and strengthen the muscles in your upper back.