#1 Ab exercise

Hanging Knee Ups are a core-shredding movement that targets the lower abs while also challenging grip strength and shoulder stability. Performed by hanging from a pull-up bar and driving your knees toward your chest, this exercise forces your core to engage from top to bottom. It’s especially effective for carving out deep ab lines, improving body control, and building the foundation for more advanced movements like toes-to-bar or hanging leg raises. When done with control and intention, hanging knee ups are a key part of any serious core routine — especially when training the Flexchamp way.