Begin with your arms straight down by your side, framing your body.
Draw knees to tabletop position, with your knees directly over your hips and your ankles in line with your knees. Extend legs straight up with toes pointed.
Engage your core by drawing your navel into your spine and pressing your lower back into the mat. Lower one leg down straight, engageing your lower abs to control. Lift back up to meet your other leg. Lower the other leg down and lift.