To do the Sit Thru, start on your hands and knees with your hands under your shoulders and your knees under your hips. Flex your feet and press up onto your hands and toes/balls of your feet.
Rotate open toward the right and kick your left leg under your body and through toward where your right hand is. As you bring your left leg forward and through, lift your right hand. You want to rotate all the way through with your left leg out straight so that you are almost sitting with your left hand down to support you. You want to “sit through.”
Then bring the left leg back through so you are back in the starting position position on your hands and the balls of your feet. Next rotate to the left and kick your right leg through and forward as you lift your left hand.
Move as quickly as you can back and forth. Beginners may need to move slower or even start in a more spread out position with their legs out straight instead of their knees under their hips.