Seated L-Sit Chin-up

This is a great advanced chin-up variation that also really works the core. It works particularly work when you have to hang your rings from lower objects such as a power rack, where it's tough to do full chin-ups with your legs straight. It also forces you to do each rep from a dead-stop, which increases the difficulty even more. It's hard to keep from swinging, which is part of the challenge of the exercise. Put a medicine ball or dumbbell between your feet to increase the core d