If you have mastered “six inches” it’s time for the boat pose. This is a bit harder!
Sit upright with your legs straight out in front of you and your arms at your sides. Then lean back so your torso is about 45 degrees to the ground.
Keep your legs together and lift them off the floor about 12 inches. Put your arms together, too, and extend them straight out in front of you.
Keep your abs tight and hold this pose.
This works your abs and lower back.