Diagonal single leg raises

Hang from the pull up bar with your arms straight and your body stable. Keeping your legs together and straight, raise one leg approx 90 degrees and across your body toward one side. Lower your leg back to the starting position, then repeat with the opposite leg and raise it to the other side.

There’s a short video demonstrating this exercise on this page. For more resources to help your calisthenics journey, check out courses here.