Frozen shoulder is one of the more frustrating things a shoulder can do. It usually starts without an obvious injury, gets steadily more painful and stiff over months, and then sits there, stuck, long enough that people start to wonder if it’ll ever move again. Most of the time it does, but the path back depends a lot on what you do along the way, and the instinct most people have (push through it, stretch it harder) tends to work against them in the early stages.
Before going further: frozen shoulder is a medical diagnosis, and several other shoulder problems can look like it at first. If your shoulder is getting progressively stiffer and you haven’t had it evaluated, start with a physician. Everything below assumes you know what you’re dealing with.
What frozen shoulder is
Frozen shoulder (the clinical term is adhesive capsulitis) involves the joint capsule, the sleeve of connective tissue that surrounds the ball-and-socket joint of the shoulder. The capsule becomes inflamed, then thickens and tightens, which leaves less room for the joint to move. The result is a shoulder that loses range in every direction, with external rotation usually the most limited.
It shows up most often between about 40 and 60 and is more common in women. It has a strong link with diabetes. A meta-analysis found that people with diabetes were about five times more likely to have frozen shoulder, and roughly 30 percent of people with frozen shoulder also had diabetes (1). Thyroid conditions have also been linked to it. If you’re diagnosed and haven’t been screened for those, it’s worth asking your doctor.
How it differs from ordinary shoulder stiffness
A lot of shoulder stiffness comes from guarding or from tissue that’s gotten used to a limited range. That kind of stiffness usually varies day to day and responds fairly quickly to training. We covered it in why your shoulder feels stuck.
Frozen shoulder behaves differently. The restriction comes from the capsule itself, so the range is limited even when someone else moves your arm for you, and it doesn’t change much from one day to the next. It also follows a fairly predictable course over a long period, which is where the stages come in.
The three stages and what each one tolerates
Frozen shoulder is usually described in three overlapping stages. The timing varies a lot from person to person, and the whole process commonly takes one to three years, sometimes longer.
The freezing stage is defined mostly by pain. The shoulder hurts, often at night, and range starts to slip away. The capsule is inflamed, and this is the stage where aggressive stretching is most likely to make things worse.
Once the shoulder moves into the frozen stage, pain usually eases somewhat while stiffness peaks. The shoulder doesn’t move much in any direction, and daily tasks like reaching behind your back or overhead get hard.
Range gradually comes back during the thawing stage. This is where training has the most room to help, because the joint is ready to tolerate more load and the goal shifts toward getting strength and control back in the range that returns.
Why forcing range early tends to backfire
The urge to stretch a stiff shoulder hard makes sense. In frozen shoulder, especially early, it tends to irritate an already inflamed capsule, which brings more pain and protective guarding.
One prospective study of 77 people with frozen shoulder compared intensive physical therapy (including passive stretching and manual mobilization beyond the pain threshold) with gentler care, where people did exercises within their pain limits. After two years, 89 percent of the gentler group had normal or near-normal shoulder function, compared with 63 percent of the intensive group (2). It’s one study, and not a randomized trial, but it lines up with what a lot of clinicians see. Working inside the pain limits tends to go better than fighting the shoulder.
We wrote about this principle more broadly in joint irritability in training. An irritable joint needs its load matched to what it can tolerate that week, and pushing past that tends to cost more time than it saves.
Training in the later stages
Once pain has settled and your physician or physical therapist has cleared you to load the shoulder, the work shifts from protecting the joint to rebuilding it.
Shoulder CARs make a good daily starting point. Slow, controlled circles through whatever range you have tell you how the shoulder feels that day and gently work every direction without forcing any of them.
External rotation is usually the most limited direction and the slowest to come back, so it gets attention on its own. The video below is a KINSTRETCH class on shoulder external rotation, and it’s a good fit for the thawing stage, taken at a pace that stays within your pain limits.
As range returns, PAILs and RAILs build strength at the ends of it, so the new range is something you can use. Loaded end-range work follows when the shoulder tolerates it, starting with light reaching overhead and building toward the movements your life or sport asks of the shoulder.
The scapula and upper back need attention through all of this. When the shoulder joint can’t move, people compensate by hiking the shoulder blade and arching the back, and those habits can stick around after the joint itself improves. We cover more of the general approach in shoulder pain and mobility training.
Where hands-on work fits
Hands-on work can play a part once the acute pain has settled. At Motive, manual therapy is designed to reduce tissue tension around the shoulder so the training that follows has more to work with, and it’s chosen from what an assessment finds. It sits alongside medical care and alongside the training, as one part of the plan.
When to see a physician
See a physician if your shoulder is getting stiffer over weeks or months without a clear injury, if night pain is keeping you up, or if you’ve had a fall or injury and can’t lift your arm. Those can point to frozen shoulder, but they can also point to a rotator cuff tear or arthritis, which need different care. If you have diabetes or a thyroid condition and develop shoulder stiffness, mention it to your doctor early.
Frozen shoulder sits in the space where medical care and training overlap, and getting the order right matters. Our piece on personal trainers versus physical therapists covers how that handoff works.
Common questions
How long does frozen shoulder last?
It commonly takes one to three years to run its course, and some people have lingering stiffness after that. The timeline varies a lot between people.
Can exercise make frozen shoulder worse?
Aggressive stretching, especially in the painful early stage, can irritate the shoulder and slow things down. Gentle movement within your pain limits is generally better tolerated, and one study found it led to better two-year outcomes than intensive stretching (2).
Who gets frozen shoulder?
It’s most common between about 40 and 60 and in women, and it’s much more common in people with diabetes (1).
If you’re in the later stages and want help rebuilding the shoulder, a movement and mobility assessment is where we start.
References
- Zreik NH, Malik RA, Charalambous CP. Adhesive capsulitis of the shoulder and diabetes: a meta-analysis of prevalence. Muscles Ligaments Tendons J. 2016;6(1):26-34.
- Diercks RL, Stevens M. Gentle thawing of the frozen shoulder: a prospective study of supervised neglect versus intensive physical therapy in seventy-seven patients with frozen shoulder syndrome followed up for two years. J Shoulder Elbow Surg. 2004;13(5):499-502.
Written by
Brian Murray, FRA, FRSC
Founder of Motive Training
Motive Training is a coaching studio in South Austin built around assessment, joint health, and strength you can use. Train with us in the studio, come to a KINSTRETCH class, or work through the progressions in KINSTRETCH Online.