: Preserve the form of your plank, however decrease your knees to the bottom, retaining the tail tucked below and glutes engaged. Your hips needs to be in entrance of your knees, to interact the core. Maintain for a depend of 30 to 60 seconds. (Elective stability problem: Interact the glutes, exhale, and float your proper leg straight behind you. Maintain for an inhale, and return to the ground. Repeat on the left. Full 10 reps.)