Lie down on your back and extend the arms out to the sides like a T. Press the palms into the ground. Flex the feet and engage the legs. Inhale to lift the left leg off the ground towards a 90 degree angle. Exhale to slowly lower. Inhale to reach the right leg up and exhale to lower it. If the low back is straining, then bring your hands underneath your sacrum and/or bend the knee. Take several repetitions on each side.
Secure the lower back to the floor. Let your breath guide the movement.
Strengthens the core muscles and builds agni.