Elbows upside down. Detailed explanation: first of all, you have to enter the water at the peak, with your elbows supporting the ground, and the distance between your elbows is shoulder width. Then lift your legs, straighten your legs and be perpendicular to the ground. If you want to make the slimming effect better, you can make the waist form an arc, so that you can quickly lose the excess fat in the waist and abdomen and practice a good figure that is convex and backward.