This oblique-based movement causes great activation from other core structures.
back, abs, shoulders, chest,arms.
Completely stellar on their own, these movements are always better when they are together.
Get into suspended plank position on hands, perform push-up , then lift hips and twist knees on side close to elbow, alternatively one side then the other. Your abs will work overtime to bring you up and out of this motion.
Frederic, Fitness trainer on the French Riviera.