From a V-Sit, continue to lift your legs higher until they're above your head. Your hips open completely, and your body forms an angle greater than 180 degrees. This is the pinnacle of core compression. It demands years of training and exceptional flexibility. Start with pike compression work and V-Sit holds. Build up to 5-10 second holds. If you can do this, you're in the top 0.1% of athletes.