I think I got it. I figured out how to do those impossible one-legged standing poses. To date, that series of 'standing on one leg' poses was the only part of the P90X Yoga X that I couldn't fully do. And it was buggin' me. I could do just about every single exercise on every single video, as good, if not better, than the buff chicks in the videos. And yoga is my thing so I HAD to be able to do the entire routine.
Well, this morning was my first time lasting through the entire series of Half Moons and whatever the other poses are called when you're standing on one leg with the other in the air. I finally discovered the trick. Instead of keeping my standing leg slightly bent, I simply made it as straight as I could. This seemed to take a lot of pressure off of my burning thigh muscle, and the pose went from a thigh strength endurance test to a balancing act. With my standing leg straight, my muscles were no longer doing all the work. All I had to do at this point was balance my weight. Yes, it's still ridiculously awkward, but now that I know the proper form, I can work on improving the balancing act.
I tested my theory by sharing the new discovery with my husband, who also struggles with these unattainable poses. To my surprise, he agreed that my suggestion helped him and he was able to get much further along with the second leg. Now I'm looking forward to Yoga X again next week. And as luck would have it, next week is another recover week so we get to face Yoga X twice in one week.