I found myself in a curious position over the weekend in yoga class. I was unable to sustain myself in a pose modified for novices or people not used to sustaining their body weight. It should have been easier for me.
The pose was side plank (Vasisthasana) — most vinyasa 1 practitioners grind their teeth when they have to get into this pose from plank. In this case, the teacher decide to use me as a demo for the pose and its modification, which required me to place the lower knee on the ground to support my core (as illustrated in the photo to the right). I found that I could not keep my leg directly under me and aligned in the same plane as my body because I could not fully open up my hip. It seemed to reach a limit at about 45 degrees. It was more difficult resting on the right knee, but I also had issues with the left variant. When I tried to muscle my way into a more open expression, it was as if I butted up against bone, with no give. It actually hurt.