This is one of those cool looking arm balances that looks harder than it actually is. I can't tell you how many times I've done a demo of this in class and all the students would roll their eyes and laugh that there was no possible way they'd be able to do it...and then, lo and behold, every single person would get up on the first try. It just goes to show you, with pretzel poses, the mind is half the battle.
The trick here is to push all your weight into your standing foot. That leg needs to be strong, and the core needs to be engaged to lift the hips up. The upper body strength comes into play a bit as well, but it's mostly about that bottom foot. Watch the video for how to get into it, and if you love it, feel free to give it a thumbs up and share it with your other yoga friends. Let me know how it goes for you down in the comments below.