To start lay flat on your back and lengthen from the toes up through your arms lightly tucking the hips and chin lengthening the spine. Take a deep breath and exhale strongly as you lift your torso and legs from the ground keeping your back relatively flat. Do not do a sit up. Reach the arms straight ahead and bring feet in line with your head. Inhale as you return softly to the floor. 10-20 reps is a good start but 100 without stopping is in your future!
Alternating V ups
You can also perform “alternating v-ups” by just lifting one leg at a time or you can hold the top v up position called the boat pose for time. 1 minute is great!