Opening scene
This is the most commonly heard shoulder instruction in yoga classes.
"Pull your shoulder blades back and down."
Sometimes it comes in other words. "Tuck your shoulder blades into your back pockets." "Open your heart." "Pull your shoulders back."
Now set that next to what you learned in the last lesson.
As the arm rises, the shoulder blade needed to move up and rotate. The socket sits on the shoulder blade, and if it doesn't rotate, the arm bone runs into the edge of the socket.
The two statements contradict each other.
So either the anatomy is wrong, or the instruction is being applied over a wider range than it should be.
The answer is the second one. And this lesson is about taking that instruction apart, start to finish.
What this lesson covers
First you'll see where the instruction comes from and what real problem it was invented to solve. Then we'll count the places where it actually works. After that we'll talk about where it closes off geometry. Then we'll separate out the three things the instruction is actually trying to fix, and build a better sentence for each one. After that we'll set down this section's most general principle: the difference between a position instruction and an action instruction. At the very end we'll get to metaphors. We'll work through sixteen examples. By the time the lesson ends, you'll be able to test the scope of a shoulder instruction when you hear one.
Starting point
We're carrying three things over from Y1.37.
The sliding connection: the shoulder blade isn't attached to the ribs by a joint; it slides over them and is held in place by muscles.
The shoulder–scapula pairing: when the arm is raised, the two places work together.
And four directions: up and down, moving toward and away from the midline, rotation, tilting.
Now we need one more concept.
This lesson is the story of one such instruction.
Mechanism
Where the instruction comes from
Let me say this up front: this instruction wasn't invented out of bad intent or ignorance. It solves two real problems.
The first problem is collapsing. In poses that require arm support — where the hands press into the floor and the torso sits between the arms — in some people the shoulder blades slide forward and the upper back rounds. The torso sinks between the arms. In this position, the arm support works inefficiently.
The second problem is shrugging the shoulders. While raising the arm, in some people the shoulders travel toward the ears more than they need to, and the area around the neck works needlessly.
In both of these problems, saying "shoulder blades back and down" does something useful. The person moves the bone in the opposite direction, and the position corrects itself.
Then what happened? The instruction broke loose from its context and started being applied to every pose.
Where it actually works
There are three places.
The first place is arm-support poses. Hands on the floor or on a surface, torso between the arms. Here the shoulder blade must not collapse, and the instruction prevents that collapse.
The second place is seated and standing poses where the arm doesn't go overhead. Torso upright, arms at the sides. The instruction does no harm here because the movement it restricts isn't wanted anyway.
The third place is a teaching moment. The instruction can be used briefly to show someone that the shoulder blade can move. It's functional as a demonstration tool.
What all three have in common is this: the arm doesn't go overhead.
Where it closes off geometry
Everywhere the arm goes overhead.
Urdhva Hastasana. You already experienced this in Y1.25; when you fixed the shoulder blade in place, the arm stopped halfway.
Support poses done at the wall or on the floor, where the arms extend overhead. We'll get to these in the next lessons.
Every movement where the arm opens out to the side and up.
The conclusion is clear: the same instruction is a solution in one pose and a restriction in another.
And what happens when someone doesn't know this? They can't raise their arm and attribute it to tightness in their shoulder. But it's their own instruction that's closing off the path.
What the instruction is actually trying to fix
Now for the most useful part of this.
This instruction is given to fix three separate things, and each of the three has a better sentence.
The first thing is shrugging. The shoulders rising more than they need to as the arm goes up.
The better sentence: reduce the load or the range. That was Y1.25's answer. Shrugging usually comes from forcing toward the end of the range; it goes away on its own when you raise the arm a little less. No holding instruction is needed.
The second thing is collapsing in arm support. The torso sinking between the arms.
The better sentence: push the floor gently away from you. This is an action instruction, and it produces the correct shoulder-blade movement on its own. You're not telling the person where the bone needs to go; you're telling them what to do, and the bone finds its own place.
The third thing is rib flare. The ribs pushing forward as the arm goes up.
The better sentence: stop at the point where the ribs don't push forward. From Y1.25. This too is a limit instruction, not a holding instruction.
Did you notice what the three sentences have in common? None of them asks you to hold a position.
Position instructions and action instructions
Now we're setting down this section's general principle.
A position instruction tells you to stay in a place. "Pull your shoulder blades back and down" is a sentence like that.
An action instruction tells you to do something. "Push the floor away from you" is a sentence like that.
Why does the difference between the two matter?
Because a position becomes invalid when the movement changes. An action, on the other hand, adjusts itself along with the movement.
We said the same thing about standing posture in Y1.24. We said Tadasana isn't a rigid stance, it's a ground for observation. The same logic holds here too, and that's not a coincidence; it's a principle that repeats throughout the course.
Metaphors
"Open your heart." "Tuck your shoulder blades into your back pockets." "Turn your chest toward the light."
We defined the metaphorical instruction in Y1.16: a cue that doesn't describe what's actually happening but can still produce the intended result.
These sentences are metaphors. And being metaphors isn't a flaw; in some people they do what an anatomical description can't.
When does the problem start? When the metaphor turns into a goal.
If "open your heart" is an instruction, and you heard it and pushed your torso noticeably backward, your ribs may have flared forward, and no one told you that. The metaphor doesn't tell you what you're doing; it just pushes you in one direction.
The rule is two sentences. Use the metaphor, but know what it's aiming at. And check whether you've reached the target not with the metaphor, but with something measurable.
Reading the examples
Master layer
Now let's refine this a little.
First: even in arm-support poses, "back and down" isn't exactly what's wanted. In those poses, what's wanted is for the shoulder blade to sit firmly against the ribs and not slide too far forward; that isn't the same as squeezing the bone toward the midline. Bringing the two shoulder blades toward each other narrows the shoulders' range in arm support, and it's generally not wanted. So even in the context where it works, the instruction is a blunt approach; the action instruction works better there too.
Second: one reason for this instruction's popularity is visibility. A torso with its shoulder blades pulled back looks corrected to someone watching from outside. The distinction between a visible criterion and a functional criterion from Y1.01 comes up here again. If an instruction produces a visible change, it's satisfying for both teacher and student; what it functionally does goes unasked, because no one is looking at it.
Third: the permanent-correction problem isn't specific to the shoulder. You've seen the same pattern three times so far in this course. In Y1.24 in standing, in Y1.28 in the knee, and now in the shoulder. The pattern is the same every time: a correction that works in one situation turns into a position held all the time and becomes a restriction. Once you recognize this pattern, you can test instructions you haven't even heard yet.
Fourth, and subtlest: this lesson criticizes an instruction but doesn't put another instruction in its place. What it puts in its place is a question: in what context is this instruction valid? This is the hardest thing to learn, because carrying a rule is easier than carrying a question. A rule gives you a ready answer in every situation; a question asks you to think again every time. But someone who doesn't carry the question into a context-sensitive place like the shoulder ends up trying to do the right thing in the wrong places, rule in hand.
Common mistakes and misconceptions
Common mistakeFirst mistake: the shoulder blades should be pulled back and down in every pose.
As the arm goes overhead, the shoulder blade needs to rotate upward and shift up somewhat; fixing the bone down restricts these movements and reduces the arm height you can reach. The instruction is functional in specific contexts; it isn't a rule.
Common mistakeSecond mistake: if an instruction is wrong, it should be thrown out entirely.
In arm-support poses, the shoulder blade collapsing makes the arm support inefficient, and the problem the instruction solves is real. Throwing it out entirely is also an overgeneralization; what's correct is learning the context and being able to choose between the two situations.
Common mistakeThird mistake: shrugging is corrected by suppressing it.
Shrugging most often comes from forcing toward the end of the range, and raising the arm a little less resolves the problem on its own. Suppression loads a constant holding job onto the area around the neck and never addresses the source.
Common mistakeFourth mistake: metaphorical instructions don't work and should be abandoned.
In some people, a metaphor produces a movement that an anatomical description can't. The problem isn't the metaphor itself, it's the lack of a criterion; whether the target has been reached is checked with something measurable, not with the metaphor.
Practice
Keep in mind
This instruction was invented to solve two real problems: collapsing in arm support and shrugging the shoulders while raising the arm.
Everywhere the arm goes overhead, the same instruction closes off the geometry, and the person sets the limit with their own instruction.
A position instruction becomes invalid when the movement changes; an action instruction adjusts itself along with the movement.
The most useful action sentence for arm support is this: push the floor gently away from you.
Metaphorical instructions can work, but used without a criterion, they only push you in one direction and don't state a limit.
Bridge to the next lesson
From here on in this section, you'll be putting your hands on the floor. At the wall, on all fours, on an inclined surface, and finally on the floor.
And something we haven't talked about at all until now will enter the picture: your wrist.
The wrist, for the first time in this course, shows up as a load-bearing joint. The foot has carried load for years and is used to it; the hand, in most people, carries none at all.
The next lesson does that preparation. Moving into arm support without preparing the wrist for load is the most common mistake of skipping a step in this section.