So much of our enculturation revolves around the idea that success takes effort, that for anything to happen we have to DO something. No doubt, we like to apply ourselves to a task, to see direct results from our actions, to believe that our effort was indispensable — the critical element to the fulfillment of our wish.
BUT we overdo… we let this attitude get out of hand. It becomes a need to control and a belief that we must control, that we must do something for things to happen. Bring that attitude to the question of “posture” and it leads to all sorts of contortions. We tense, shorten, push, hold, and fix in the attempt to stand up straight, sit comfortably, hold a yoga pose… But those attempts add tension to a system that's already disorganized. What would happen if we explored not doing anything in these situations?
Healthy posture actually requires less work than we're used to thinking it does — because what it requires is a different kind of thinking. Every one of us, as an infant, was motivated to sit up, stand, walk — and our bodies organized themselves accordingly, free from any thoughts of how we “ought” to do it! The human body is magnificently structured for movement. Rather than coaching ourselves to engage certain muscles to stand or move well (strengthen your core! Lift your chest! Tighten your glutes!), it is more appropriate and productive to exert mental engagement, to focus on our conscious response, refrain from interfering with our balancing mechanisms, and trust to the intelligence of the body for the best organization to execute the task at hand.
A student of mine noticed significant changes in his yoga practice after an in-depth exploration of Alexandrian Inhibition. We'd played this game: After some time quieting oneself in semi-supine, think about moving a limb — but then don't. Actively consider the action, and refrain. Persist in this practice for 10-15 minutes, and notice the effects on the body. “Background programs” of tension become highlighted, and switch off. A natural expansion and buoyancy is evoked as the body organizes itself differently when it's given time and space to not do anything. By refraining from immediately responding to an internal (during the game) or external (during yoga class) command to move, my student found that his body reorganized in a way that was different, and better, than what he would have done on his own.