Ok, the L wall holds are REALLY hard for me. I feel like I'm muscling in the shoulders and arching in the low back. It's better if I lift one leg, so I don't know what I"m doing in the L shape that's not settling. Watching the video, I think at first I was too close, but I'm really trying to make sure I don't go too far and end up being in a slight down dog shape. Help!!