UNDERSTANDING YOUR SHOULDER PAIN

The shoulder is one of the most mobile joints in the human body. It allows us to reach overhead, lift objects, throw, push, pull, and perform countless daily tasks. However, this impressive range of motion comes with a challenge: the shoulder must balance mobility with stability.

Unlike joints such as the hip, which sits in a deep socket designed for stability, the shoulder relies heavily on muscles, tendons, and coordinated movement to stay controlled. Understanding how the shoulder works can help explain why shoulder pain develops and how physiotherapy can help restore comfortable, confident movement.

THE SHOULDER IS MORE THAN ONE JOINT

When people talk about "the shoulder," they are often referring only to the ball-and-socket joint where the upper arm meets the shoulder blade. However, shoulder movement involves a coordinated system that includes:

• The glenohumeral joint (the main ball-and-socket joint)
• The scapula (shoulder blade)
• The clavicle (collarbone)
• All the attached muscles, ligaments, and tendons that control movement

Every time you raise your arm, these structures work together. The scapula rotates and adjusts its position while the upper arm moves, creating a smooth and efficient movement pattern.

THE SHOULDER BLADE PLAYS AN IMPORTANT ROLE

The scapula acts as the foundation for shoulder movement. It provides a stable base for the rotator cuff and other muscles to generate force while allowing the arm to move freely. However, there is no single “perfect” way every scapula should move.

A recent systematic review examining scapular movement patterns found considerable variability in scapular motion among individuals, including those with and without rotator cuff-related shoulder pain. This challenges the idea that every healthy shoulder should follow an identical movement pattern.

Instead of focusing on creating a perfect posture or forcing the shoulder blade into a specific position, physiotherapy focuses on helping each person develop efficient movement strategies that match their activities and goals.

THE ROTATOR CUFF: SMALL MUSCLES WITH A BIG JOB

The rotator cuff is a group of four muscles that surround the shoulder joint. While these muscles contribute to shoulder movement, one of their most important roles is providing dynamic stability.

The rotator cuff helps:

• Keep the head of the humerus centred within the shoulder socket
• Control movement during reaching and lifting
• Allow the larger shoulder muscles, such as the deltoid, to work effectively

When the shoulder is exposed to more load than it is prepared to handle, the tissues around the shoulder may become irritated or painful. For example, a sudden increase in exercise, repetitive overhead activity, or returning to sport after a break.

This does not always mean something is damaged or "out of place." Often, the issue is that the shoulder's current capacity does not match the demands being placed on it.

WHY SHOULDER PAIN DEVELOPS

Shoulder pain can arise from many different factors, including:

• Changes in activity levels or workload
• Reduced strength or endurance
• Previous injuries
• Changes in movement coordination
• Reduced tolerance of certain positions or activities

Modern approaches to shoulder rehabilitation recognize that pain is influenced by interactions among tissues, the nervous system, activity demands, and individual factors.

Rather than searching for a single cause, physiotherapists assess how the entire shoulder system functions.

HOW PHYSIOTHERAPY HELPS SHOULDER MECHANICS 

A physiotherapy assessment looks at more than just where pain is located. It considers:

• How your shoulder moves
• Your strength and endurance
• Your ability to perform meaningful activities
• How your shoulder responds to different loads

Treatment may include:

Exercise therapy
Progressive strengthening helps improve the shoulder's ability to tolerate everyday demands, whether that means lifting groceries, returning to sport, or performing work tasks.

Movement Retraining
Exercises can help improve coordination between the shoulder blade, rotator cuff, and larger shoulder muscles.

Education and Load Management
Understanding how to gradually increase activity helps prevent repeated flare-ups and builds long-term confidence with movement.

Research on exercise-based rehabilitation for rotator cuff-related shoulder pain suggests that exercise may act through several mechanisms, including improvements in strength, movement control, confidence, and tissue tolerance to load.

THE GOAL: A SHOULDER THAT WORKS FOR YOU

A healthy shoulder is not necessarily one that moves in exactly the same way as everyone else's. Shoulders are adaptable, and effective movement can look different from person to person.

The goal of physiotherapy is not to create a "perfect" shoulder. It's to help you develop a shoulder that is strong, capable, and able to support the activities that matter most to you.

If you are experiencing shoulder pain or difficulty with movement, a physiotherapist can help identify the factors contributing to your symptoms and create a plan to improve your function.

Want to learn more? Book an appointment with Alida Bonomo at Great North Physiotherapy in St. Catharines or Niagara-on-the-Lake. Schedule online at www.greatnorthphysio.ca or call 289-606-0966 to speak with our team.

Always consult a healthcare professional before starting a new exercise routine and prioritize consistency and good form for optimal benefits.

REFERENCES

1. Fernández-Matías R, Ballesteros-Frutos J, Gallardo-Zamora P, et al. Scapular kinematics variability in individuals with and without rotator cuff-related shoulder pain: A systematic review with multilevel meta-regression. Brazilian Journal of Physical Therapy. 2025.

2. Powell JK, Schram B, Lewis J, Hing W. “You have (rotator cuff related) shoulder pain, and to treat it, I recommend exercise.” A scoping review of the possible mechanisms underpinning exercise therapy. Musculoskeletal Science and Practice. 2022.

3. Barcia AM, Makovicka JL, et al. Scapular motion in the presence of rotator cuff tears: A systematic review. Journal of Shoulder and Elbow Surgery. 2021.

4. Fu X, Yung PSH, Ma CC, Leong HT. Scapular Kinematics in Athletes With and Without Rotator Cuff Tendinopathy: A Systematic Review. Journal of Sport Rehabilitation. 2020.