Sometimes all it takes is a small act of rebellion—like taking a side bend in a pose that doesn't call for it—to remind you to live a little. Or a lot.
Before you plunge into more difficult poses, take the time to set shoulder, spine, and hip alignment that will serve you throughout your sequence.
Tadasana (Mountain Pose) is the posture that invokes Samasthiti. These poses are not different. They are the same.