What Is Shoulder Impingement?

Shoulder impingement, also known as subacromial impingement syndrome, is one of the most common causes of shoulder pain and dysfunction. It occurs when the rotator cuff tendon becomes compressed. You might be wondering—what is the rotator cuff? One common question we get: “How do these small muscles cause me so much pain and problems?” Keep reading and you’ll find your answer below!

What Is the Rotator Cuff?

The rotator cuff is a group of muscles that help you move your shoulder in various directions. These include: turning your shoulder in and out, opening your arm sideways, initiating lifting your arm forward, and stabilising your shoulder.

What Causes Shoulder Impingement?

Anatomically, the rotator cuff muscle tendons merge as one at the outer tip of the shoulder blade, passing through the subacromial space—a narrow canal shaped like a highway tunnel within the shoulder joint (see picture below). The tendon may be compressed within this narrow canal for these reasons:

• Repetitive overhead movements and overuse
  
• Posture – round back and protracted shoulder
  
• Rotator cuff muscle imbalance and weakness
  
• Anatomical structures – some of us are born with a narrower subacromial space! Yes, there are variations in our joint structures (you’ll find more info below)
  
• Trauma – from high-impact injuries such as a fall, road traffic accidents, or shoulder dislocation
  
• Ageing and degeneration / bone spurs also play a part

The rotator cuff tendon, and the surrounding muscles and ligaments, are rich in blood capillaries and nerve endings. When the tendon is compressed, the friction leads to inflammation, which irritates the nerves—therefore, pain.

Who Is At Risk of Shoulder Impingement?

From what you read earlier, you’ve guessed it right:

• Athletes with lots of overhead movement – tennis players, swimmers, weightlifters, and badminton players
  
• Manual workers – carpenters, painters, and construction workers
  
• Professionals with repetitive arm use – hairdressers, chefs, and factory workers
  
• Office workers – poor posture and long hours at a desk increase the risk
  
• Home-makers – daily household tasks like repetitive cleaning, cooking, lifting children, and carrying heavy loads can strain the shoulders over time

What Are the Symptoms of Shoulder Impingement?

When it newly develops, you may experience early signs such as:

• Pain in the front or side of the shoulder – it worsens with movement
  
• Pain when lifting and lowering the arm
  
• Shoulder stiffness and weakness – may worsen as symptoms progress

As the symptoms worsen, you may begin to experience:

• Night pain – worse when you sleep on the affected side
  
• Weakness in the arm – you find it difficult to carry groceries or lift objects
  
• Clicking or popping sounds – audible when you move your shoulder
  

Pain during daily activities – grooming and dressing become difficult

Wait, You Haven’t Told Me How My Joint Structure Affects Me?

Look at the picture above —there’s a structure labelled acromion. This is a bony projection from the shoulder blade that forms the upper part of the subacromial space—the tunnel. There are 3 types of acromion in the picture below:

• Type I (Flat Acromion) – wider, provides more space for tendons
  
• Type II (Curved Acromion) – narrower space, increased friction
• Type III (Hooked Acromion) – much narrower, high friction, leads to impingement and inflammation

People with Type II or Type III acromions are at higher risk of developing shoulder impingement. This led to what’s known as Primary (Structural) Impingement.

And, What About My Posture?

Poor posture and muscle imbalances can also contribute to impingement. Rounded shoulders and poor posture reduce space in the shoulder joint. Alongside the factors below, this increases the compression of tendons within the subacromial space, leading to what’s known as Secondary (Dynamic) Impingement.

• Weak rotator cuff muscles – causes instability, leading to excessive friction
  
• Previous shoulder injuries – dislocations, fractures, or past surgeries can alter shoulder joint mechanics

How Is Shoulder Impingement Diagnosed?

At Rehab Concept, we specialise in diagnosing and treating shoulder impingement syndrome using a structured assessment and evidence-based approach.

What to Expect in Your Consultation:

1. Case history – we discuss your symptoms, daily activities, and any previous injuries.
2. Physical examination – we test your range of motion, strength, and assess your posture.
3. Special tests such as:

• Neer Test
• Hawkins-Kennedy Test 
• Empty Can Test 

If necessary, we may refer you to an orthopaedic doctor for further investigation. Early diagnosis ensures faster recovery and prevents complications like rotator cuff tears.

How Do We Treat Shoulder Impingement?

At Rehab Concept, we take an evidence-based approach to treating shoulder impingement syndrome.  Our goal is to reduce pain, restore movement, and strengthen the shoulder through non-srugical treatment options.

Our Treatment Methods Include:

1. Manual therapy – we use hands-on techniques such as joint mobilisation and soft tissue release to relieve tension and improve mobility.
2. Exercise therapy – we guide you through a personalised physiotherapy programme focusing on the missing components, be it strength, flexibility or shoulder stability.
3. Postural training – we assess and help you to improve your posture.
4. Electrotherapy –  if necessary, we may apply modalities such as ultrasound therapy to reduce inflammation and promote healing.
5. Activity modification advice – there’s always a way to avoid aggravating movements and gradual return to sports or work activities.

Most cases of shoulder impingement improve within 4-12 weeks with consistent physiotherapy. Severe cases may require corticosteroid injections or, in rare instances, surgery (subacromial decompression).

What You Need to Know

• Shoulder impingement is a leading cause of shoulder pain, affecting home-makers, athletes, workers, and office employees alike.
• Early diagnosis and treatment prevent chronic pain, weakness, and tendon damage.
• Physiotherapy is the most effective treatment, focusing on pain relief, mobility restoration, and muscle strengthening.
• Rehab Concept provides expert assessment, treatment, and personalised rehabilitation programmes to help patients regain full shoulder function.

Suffering from shoulder pain? Don’t wait! Book an appointment with Rehab Concept today and start your recovery journey.

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