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Sternoclavicular (SC) joint sprain: understanding your shoulder pain and getting back to activity

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What is an SC joint sprain?

SC joint anatomy

The sternoclavicular (SC) joint connects the inner end of the collarbone to the breastbone. It’s the only direct bony attachment point between the upper limb and the axial skeleton. It’s stabilised by a set of strong ligaments, which makes its sprain rarer than that of the AC joint, but potentially more serious in the case of significant displacement.

Why does this joint get injured?

An SC joint sprain most often occurs from a direct blow to the front of the shoulder, or a fall with the arm outstretched, which transmits indirect force up to the collarbone. Contact sports and high-speed falls are the most common circumstances.

SC joint area of the shoulder in the HOPP app
Physio insight: backward displacement of the collarbone (a so-called “posterior” sprain) is rarer but more concerning than forward displacement, as it can compress vascular or respiratory structures located just behind the joint: that’s why any significant trauma to this area should be assessed by a doctor.

Which sports contribute to SC joint sprains?

Any sport with a risk of a direct blow to the front of the shoulder or a significant fall exposes you to this sprain:

  • Rugby and American football
  • Judo and combat sports
  • Cycling and mountain biking
  • Skiing and snowboarding
  • Ice hockey
  • Contact sports in general
Physio tip: look at the area between your breastbone and collarbone: visible swelling or asymmetry there, combined with pain on pressure, is suggestive of an SC joint sprain that should be confirmed by a doctor.

Treating an SC joint sprain in rehab with a sports physio

The goal of treatment is to allow the ligaments to heal under good conditions, while maintaining shoulder mobility and progressively strengthening the shoulder girdle’s stabilising muscles.

  1. 1Protection and pain reduction
  2. 2Recovering pain-free mobility
  3. 3Isometric strengthening of the rotator cuff
  4. 4Strengthening scapular stability
  5. 5Shoulder proprioceptive work
  6. 6Closed-chain strengthening
  7. 7Open-chain strengthening
  8. 8Strengthening under sport-specific load
  9. 9Progressive return to your sport
  10. 10Return to competition

Why the physio’s initial assessment matters

During the initial assessment, the physiotherapist aims to identify the exact mechanism of injury, the intensity of the pain, and confirm the absence of associated signs (difficulty breathing or swallowing) that would suggest posterior displacement requiring an urgent medical opinion.

“Most simple SC joint sprains heal well with progressive, suitable rehab.”

Strengthening, the cornerstone of treatment

Strengthening the shoulder blade and shoulder girdle stabiliser muscles restores a stable, functional shoulder. The return of mobility must be progressive and pain-free, particularly for overhead arm movements.

In brief

  • Maintaining shoulder and trunk mobility
  • Strengthening the shoulder girdle stabilisers
  • Progressive return to weight-bearing on the arm
  • Gradual return: mobility, then load, then sport
Guided mobility exercise in the HOPP app

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Should you rest or keep playing sport?

Brief immobilisation can be useful for comfort in the first few days, but prolonged rest isn’t recommended. It’s better to gently mobilise the shoulder as soon as the acute pain eases and start strengthening the stabilisers promptly.

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When should you see a specialist for an SC joint sprain?

Any SC joint sprain with significant trauma, visible deformity, or associated signs (breathing difficulty, trouble swallowing) requires prompt medical attention to rule out posterior displacement, rarer but more concerning.

The HOPP care programmes to treat your SC joint sprain and get back to sport

This sprain requires progressive support for ligament healing and muscle strengthening. HOPP offers you a precise exercise programme, allowing you to get back to your activities as quickly as possible.

Gentle stretches for the shoulder and trunk, introduced progressively once the acute phase has passed.
Full shoulder and shoulder girdle mobility work to prevent any associated stiffness.
Progressive strengthening of the shoulder blade and trunk stabilisers.
A progressive, guided return to weight-bearing and contact, particularly for contact sports.

The programme runs from 3 to 9 weeks depending on the injury and ends with a reconditioning phase allowing a return to competition in the best possible conditions. Each programme is designed by the HOPP team, made up of two sports physiotherapists who are experts in assessing and treating athletes. You’ll also find theoretical content throughout your progression, so you master every aspect of your recovery and can adjust your treatment independently. If needed, our team of physiotherapists is on hand to support you.

Essential

FROM INJURY TO
BACK TO YOUR ACTIVITIES

59€

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“AT YOUR OWN PACE WITH
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  • 100% of the treatment programme
  • Daily personalisation
  • Flexibility / Mobility
  • Strengthening
  • Proprioception
  • Progress tracking
  • Return-to-running programme
  • Theoretical content included
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  • 100% of the treatment programme
  • Daily personalisation
  • Flexibility / Mobility, Strengthening, Proprioception
  • Progress tracking
  • Return-to-running programme
  • Theoretical content included
  • + 4-week return-to-play plan with 6 difficulty levels
  • + 2 video calls with an expert sports physio / return check-up
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A programme that adapts to you every day

Every day, how you feel (RPE) is factored in to automatically adjust the rest of your programme: more load if all is well, a bit less if your shoulder is complaining. This daily personalisation is what makes the difference compared to a fixed, paper-based programme.

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Post-effort RPE questionnaire in the HOPP app

F.A.Q

Does the HOPP programme replace a medical consultation?

No. HOPP is a support and rehab tool designed by sports physiotherapists, but it doesn’t replace a doctor’s opinion. If in doubt, or if the pain persists, see a health professional.

Is the programme suited to all sporting levels?

Yes. Every programme is personalised to your sport, your level and how you feel each day, whether you’re a recreational athlete or preparing for competition.

Is an SC joint sprain serious?

Most simple sprains (forward displacement or no displacement) heal well with functional treatment. Forms with backward displacement are rarer but require prompt medical assessment.

How long does it take to get back to sport?

For a simple sprain, returning to sport generally happens between three and six weeks, depending on severity and the sport practised.

Can I keep training while it heals?

You can generally maintain an activity that doesn’t directly stress the shoulder and trunk, while waiting for a progressive, guided return.

Thibault Vignais, sports physio

Written by Thibault Vignais

Sports physio and osteopath, HOPP co-founder

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