The Shoulder That Never Quite Feels Right Again
Why some shoulder pain keeps returning no matter how much rehab you do, and the overlooked cause behind it
Picture this: you hurt your shoulder months ago. Maybe it was a fall, a heavy lift, or a hard tackle. You did the right things: rested it, iced it, worked through a rehab program. The sharp pain eased off. On paper, you recovered.
And yet the shoulder never quite feels like it used to. It aches after training. It catches when you reach behind your back. Every so often, it feels like it might just give way. You've been told it's "probably fine" more than once, but it doesn't feel fine.
This is the first article in our five-part shoulder series, where we unpack the issues that most commonly get missed in shoulder rehab. We're starting with one of the biggest ones: shoulder instability.
It's Not Always About the Injury You Remember
When people think of shoulder instability, they usually picture a dramatic dislocation: a shoulder popping out during a footy match, needing to be put back in on the sideline. That's one version of it, but far from the only one.
Instability can also build up slowly and quietly. Repetitive overhead movement in swimming, throwing sports, or weightlifting. Naturally flexible joints that were never a problem until load increased. Even a "minor" shoulder injury years ago that never fully rebuilt its control. None of these look dramatic from the outside, but they can all leave the shoulder without the support it needs.
Understanding the Joint Behind the Pain
The shoulder trades stability for range of motion. It's the most mobile joint in the human body, which is exactly why it needs so much support from soft tissue (the labrum, ligaments, joint capsule, and the muscles that control the shoulder blade and rotator cuff) to stay controlled through that range.
When that support system isn't functioning well, the ball of the shoulder shifts more than it should inside the socket. Your body senses this and starts recruiting other muscles to compensate, often the very muscles that end up sore, tight, or inflamed. The pain shows up in one place; the actual problem is happening somewhere else.
Why the Standard Approach Often Falls Flat
Most people who've dealt with shoulder pain have been handed a sheet of rotator cuff exercises at some point. It's not bad advice: the rotator cuff matters. But when instability is the real driver, generic strengthening alone is treating a symptom of the problem, not the problem itself.
It's a bit like re-inflating a tyre without checking why it kept going flat in the first place. You might feel some relief, but if the underlying control issue is never addressed, the same pattern of pain tends to resurface, often at the worst time, like the middle of a season or a big lifting block.
Signs This Might Be What's Going On For You
● A sense that your shoulder is "loose" or could slip, even without full dislocation
● Pain concentrated around overhead reaching, throwing, or lifting away from the body
● A previous dislocation or subluxation, even one that happened years ago
● Rehab that helps a little, then plateaus, no matter how consistent you are
● Clicking, clunking, or a vague, hard-to-locate ache
● A feeling of fatigue or heaviness in the shoulder during repetitive activity
Not everyone with shoulder pain has instability, but if several of these sound familiar, especially alongside a rehab plateau, it's worth having it properly assessed rather than assumed away.
How We Look at This Differently
Rather than starting from "where does it hurt," our assessment starts from "how well does your shoulder control itself through movement." That distinction changes everything about the treatment plan that follows. At The Physio Crew, this typically includes:
● A detailed history of any past dislocations, subluxations, or repetitive loading patterns
● Specific instability and joint laxity testing across different shoulder positions
● Assessment of scapular (shoulder blade) control alongside rotator cuff strength
● Objective strength and left-right asymmetry testing using VALD technology, where useful
● A broader movement screen, since hip and core control often feed into how the shoulder is loaded
The result is a much clearer answer to the question that matters most: why does this keep happening, not just what hurts today.
What Real Rehab for Instability Looks Like
Once instability is identified as a contributing factor, the plan shifts from "strengthen everything" to something far more specific and staged:
● Targeted strengthening of the rotator cuff and scapular stabilisers based on your specific deficits
● Proprioception and neuromuscular control work, retraining the shoulder to sense and control its own position
● Graded, progressive exposure to the positions that currently provoke instability, rebuilding trust in the joint safely
● Manual therapy where it helps manage pain alongside the strengthening process
● A realistic, milestone-based return-to-sport or return-to-lifting plan
This is deliberately slower and more structured than a generic program, because the goal isn't just less pain today, it's a shoulder you can rely on under real load, not just in the treatment room.
A Few Things Worth Unlearning
"If it never fully dislocated, it can't be instability."
Instability sits on a spectrum. Many people have subtle, ongoing instability that never progresses to a full dislocation but still quietly limits them for years.
"My scan came back clear, so it must be fine."
Imaging is excellent at picking up structural damage. It's far less useful at capturing control and movement quality, which is usually where instability actually lives.
"I just haven't been strengthening it enough."
More reps of the wrong exercise won't fix a control problem. The right exercise, sequenced correctly, matters far more than sheer volume.
Who Tends to Notice This Most
While instability can affect anyone, a few groups tend to run into it more often. Contact sport athletes with a history of a previous dislocation are an obvious one, but swimmers, throwers, and volleyball players with naturally mobile joints are just as commonly affected, simply from the repetitive overhead demands of their sport.
Weightlifters pushing heavier overhead and pressing loads over time can also develop it gradually, as can people who are naturally more flexible than average (sometimes called hypermobile) even if they've never played competitive sport at all. In all of these groups, the pattern is the same: the joint is being asked to do more than its current control system can reliably manage.
A Quick Self-Check (Not a Diagnosis)
This isn't a substitute for a proper assessment, but if you're wondering whether this article applies to you, ask yourself honestly:
● Has my shoulder ever felt like it was about to "give way" during a specific movement?
● Do I feel stronger and more stable on one side than the other?
● Have I done a rehab program before that helped briefly, then stopped working?
● Am I avoiding certain positions or exercises because my shoulder feels unreliable there?
If you answered yes to two or more of these, instability is worth ruling in or out properly, rather than continuing to guess.
Where to From Here
If your shoulder pain has settled a little but never fully resolved, or if it keeps returning every time you push back into sport, training, or heavy lifting, it's worth getting the actual driver identified rather than repeating another round of generic exercises.
In the next part of this series, we'll look at how shoulder instability connects to other common diagnoses like impingement and rotator cuff tendinopathy, and why so many shoulders get treated for the wrong thing entirely.
Shoulder pain that keeps coming back?
Book a proper assessment at our Tullamarine, Carlton, or Keilor Downs clinic and get a clear answer, not another generic exercise sheet.