Popsugar Health & Fitness Core Exercises Best Yoga Poses For a Strong Core I Teach Yoga and Do CrossFit, and These Are the 18 Core-Carving Yoga Poses I'm Obsessed With 7 March 2019 by Jenny Sugar View On One Page Photo 5 of 18 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 5 Knee-Up Plank Come into plank position with your legs and arms straight and shoulders stacked over the wrists. Bend your right knee and squeeze it into your chest. Hold here in Knee-Up Plank for five breaths. Previous Next Start Slideshow Core ExercisesCrossFitYogaWorkoutsAb Exercises