Most shoulder problems are not caused by one dramatic moment. They are built slowly, out of small positioning habits repeated a few thousand times. The good news is that habits are visible once you know what you are looking for.
Mistake one: leading with the shoulder
Watch someone reach for something on a high shelf. If the top of the shoulder travels up toward the ear before the arm does, upper trapezius has taken charge of a movement that should have started at the shoulder blade.
It works, in the sense that the arm gets there. Over time, some people find overhead reaching starts to ache.
Mistake two: the blade that will not rotate
A shoulder blade that stays fixed while the arm lifts forces the joint to find range it does not have. This is a common pattern in people who feel a pinch at the front of the shoulder when reaching overhead.
Mistake three: winging
If the inner edge of the blade lifts away from the ribcage during a push, serratus anterior is not holding it down. You often see it in a press up or when pushing the reformer carriage away. It looks like a small wing appearing on the back.
Mistake four: living in one position
Rounded forward, shoulders slightly up, for eight hours. Nothing about a single moment of that is harmful. The repetition is the issue, because the body gets efficient at whatever you ask it to do most often.
How to catch yourself
- Film one set at home. Phone propped up, from behind. What you feel and what you do are often two different things.
- Feel for the ear. If your shoulder is rising toward it, start the movement again lower.
- Check both sides. Most people have a dominant side that does more and a quiet side that does less.
- Go lighter. Nearly every pattern on this list appears when the load is slightly too much. Ask your instructor to change your spring and the movement usually organises itself.
What we do about it in class
This is where having physio-trained instructors actually shows. Rather than a general cue to relax your shoulders, you get a specific one: start the movement from the blade, or keep your ribs down, or come back a centimetre. Small corrections, applied early, before a pattern becomes a problem.
Tell your instructor about any shoulder history before class. It changes what they look out for.
Where to go next
For the full picture, pair this with Healthy Shoulder Movement, which covers what the blade should be doing instead.
If a shoulder is genuinely painful rather than just poorly organised, start with the physiotherapists at Malvern Physiotherapy Clinic a few doors up, then come back to class. How that works.



