Come on to hands and knees with hands directly below shoulders and knees directly below hips. Spread fingers wide and tuck toes under. Inhale and lift knees off the floor, pressing hips and sit bones up toward the ceiling. Keeping knees slightly bent will stretch tight pelvic floor muscles; if your goal is to tone the muscles, straighten knees and focus on pressing heels into the floor to activate the pelvic floor muscles into contraction. Take deep breaths while holding the pose.