No-Equipment Ab Exercises Chart - Bodyweight exercises always recruit more than one muscle group for each exercise so it is impossible to isolate and work one muscle group specifically by doing one type of exercise. It is however possible to increase the
Targets your Internal and External Obliques. Synergistic muscles are your Hip External Rotators, Psoas Major, Iliocastalis Lumborum, Iliocastalis Thoracis, and Quadratus Lumborum. Also known as weighted oblique twist.