
Muscle imbalance can cause shoulder pain and long-term problems such as chronic impingement. It can be caused by repeatedly performing the same type of activity, like running, lifting, or sitting, which can lead to certain muscles becoming over-trained or under-trained in comparison to others. This can result in poor posture, pain, and even injury. For example, a person with stronger chest muscles and a weaker back may experience a pinching sensation in the shoulder. Physiotherapy is a successful treatment for this condition, and preventative measures include strength training and varying your movements.
| Characteristics | Values |
|---|---|
| Definition | Muscle imbalance occurs when muscles or groups of muscles attached to either side of a joint do not have equal strength, length, and/or activity. |
| Causes | Overuse or underuse of muscles, bad posture, injuries, or repeatedly doing the same type of activity. |
| Symptoms | Aches and pains that don't dissipate, soreness when not working the muscles, pinching sensation in the shoulder, and pain in the upper back, neck, and shoulders. |
| Treatment | Strength training, physiotherapy, and exercises for the lower trapezius. |
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What You'll Learn
- Muscle imbalance can cause limited mobility, pain, and postural problems
- Poor posture is a common cause of uneven shoulders
- Lifestyle factors, such as carrying heavy loads on one side, can contribute to muscle imbalance
- Pre-existing shoulder injuries or spinal conditions can lead to muscle imbalance
- Physiotherapy can treat muscle imbalance through exercises, manipulations, and massage

Muscle imbalance can cause limited mobility, pain, and postural problems
Uneven shoulders are a common sign of muscle imbalance, where one shoulder appears higher than the other. This can be caused by various factors, including poor posture, flat feet, dominant movement favoring one side, carrying heavy loads on one shoulder, or overuse in sports or repetitive movements. These imbalances can lead to changes in movement patterns and impair normal function, resulting in limited mobility and postural issues.
The impact of uneven shoulders on the back muscles is significant. The higher shoulder strains the back muscles, while the lower shoulder causes deterioration due to underuse. This creates asymmetry in muscle tension and strength, leading to postural problems, fatigue, and pain. Addressing uneven shoulders and muscle imbalances typically involves strength training and exercises that target specific muscle groups to restore balance.
Physiotherapy plays a crucial role in treating muscle imbalances of the shoulder. A physiotherapist will assess the strength, tone, and length of the muscles in the shoulder complex. Treatment includes stretches for tight muscle groups and strengthening exercises for weak muscle groups. In some cases, hands-on techniques such as manipulations or massages may be used to increase the range of motion and accelerate recovery.
Muscle imbalances can also lead to a condition called impingement, which is characterized by pinching sensations in the shoulder joint due to structural or functional causes. Functional impingement is associated with glenohumeral instability and is common in overhead athletes, while structural impingement can result from narrowing of the subacromial space. Early intervention and addressing muscle imbalances are essential to prevent long-term issues and manage pain effectively.
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Poor posture is a common cause of uneven shoulders
In addition, certain sports, habits, and activities that involve the heavy use of one arm can cause muscular imbalances that lead to uneven shoulders. For instance, the Journal of Athletic Training found that among male athletes who played sports with overhead motions, such as tennis, baseball, and volleyball, the scapula (shoulder blade) on the dominant side was more inwardly rotated than the scapula on the non-dominant side.
Muscular imbalances can also be caused by unbalanced training regimes, training for a particular sport, and work-related tasks. For example, arm dominance can affect shoulder balance, with the dominant arm often having a larger muscle size compared to the non-dominant arm. This can cause one shoulder to be higher than the other.
Poor posture can also change how the back sits, causing one side to feel higher than the other. This misalignment can tire out muscles and joints, resulting in pain and reduced mobility in the shoulders.
If left untreated, muscle imbalances can lead to long-term problems such as chronic impingement of the shoulder. This is caused by the pinching of structures in or around the shoulder joint, resulting in pain and reduced mobility.
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Lifestyle factors, such as carrying heavy loads on one side, can contribute to muscle imbalance
Lifestyle factors such as carrying heavy loads on one side can contribute to muscle imbalance. This phenomenon is known as "dominant movement" and can lead to muscle imbalance and postural problems. It is important to address these imbalances to prevent long-term issues such as chronic impingement of the shoulder.
Carrying heavy loads on one side can cause uneven shoulders, where one shoulder is higher than the other. This can be due to a variety of reasons, from minor habits such as carrying a heavy handbag to more severe problems. Over time, this can lead to a muscle imbalance in the back, with the higher shoulder straining the back muscles and the lower shoulder deteriorating due to underuse. This creates fatigue and tension on one side and weakness on the other, resulting in postural issues and back pain.
Poor posture is another common cause of uneven shoulders and muscle imbalance. This can be due to incorrect sitting or standing positions, especially during sedentary activities such as working or watching television. Slouched postures while using laptops or smartphones have also been linked to uneven shoulders. Poor posture can lead to weak and tight muscles, which can contribute to muscle imbalance in the back and shoulders.
In addition to lifestyle factors, other causes of muscle imbalance include acute or chronic injuries, pre-existing shoulder or spinal conditions, and muscle dysfunction or skeletal conditions such as scoliosis, osteoporosis, or arthritis. It is important to identify the underlying cause of muscle imbalance and seek appropriate treatment, such as physiotherapy or physical therapy, to restore proper muscle function and prevent further complications.
To summarise, lifestyle factors such as carrying heavy loads on one side and poor posture can contribute to muscle imbalance in the back and shoulders. This can lead to postural problems, pain, and limited mobility. Addressing these lifestyle factors and seeking appropriate treatment are crucial to managing muscle imbalances effectively.
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Pre-existing shoulder injuries or spinal conditions can lead to muscle imbalance
Muscle imbalances can be caused by pre-existing shoulder injuries or spinal conditions. For example, an individual with a spinal condition may have a weaker upper back due to spending long periods hunched over. This can lead to muscle imbalances as certain muscles are overused or underused. In the case of a spinal condition, the upper back muscles may weaken, causing a muscle imbalance.
Similarly, a pre-existing shoulder injury can cause a muscle imbalance in the back, leading to shoulder pain. This can occur when the muscles attached to a joint do not have equal strength, length, or activity. For instance, an individual with a shoulder injury may favour one side, leading to overuse of certain muscles and underuse of others. This can cause an imbalance in the shoulder and back muscles, resulting in pain and discomfort.
Individuals with pre-existing shoulder injuries or spinal conditions are more susceptible to developing muscle imbalances due to the body's natural tendency to compensate for the injury or condition. For example, an individual with a shoulder injury may favour the uninjured side, causing an imbalance in muscle use and development. Similarly, an individual with a spinal condition may adopt a particular posture or movement pattern to minimise pain or discomfort, leading to an imbalance in muscle use and development.
The impact of pre-existing shoulder injuries or spinal conditions on muscle imbalance can be understood through the concept of "dominant-side advantage." The dominant side, or the side that is more frequently used or favoured, tends to develop stronger muscles. In the case of a pre-existing shoulder injury or spinal condition, the body may favour the side that is not affected, leading to an imbalance in muscle strength and development.
To address and prevent muscle imbalances caused by pre-existing shoulder injuries or spinal conditions, individuals should seek professional advice and undergo targeted strength training. Physiotherapy and targeted exercises can help correct muscle imbalances and improve overall shoulder and spinal health. It is important to understand the underlying causes and address them through appropriate exercises, postural adjustments, and targeted strength training to restore balance and prevent further issues.
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Physiotherapy can treat muscle imbalance through exercises, manipulations, and massage
Muscle imbalances in the back can indeed cause shoulder issues. Muscle balance refers to the relationship between the tone or strength and length of the muscles around a joint. When this relationship is altered, a muscle imbalance occurs. In the shoulder, the muscles at the front and chest often become stronger and shortened in relation to the muscles at the back, leading to a muscle imbalance. This can be caused by unbalanced training regimes, training for sports, work-related tasks, and poor posture.
Physiotherapy can effectively treat muscle imbalance through exercises, manipulations, and massage. Here's how:
Exercises
Physiotherapy treatment for muscle imbalance often involves specific exercises to rectify imbalances in the musculature. For instance, dumbbell fly exercises for the shoulder can be performed under the supervision of a physiotherapist. Exercises using stretch bands, weight machines, and free weights can help strengthen weak muscles. Additionally, repetitive drills can help reawaken dormant neural connections, improving muscle activation sequences.
Manipulations
Manipulations are manual techniques employed by physiotherapists to physically affect a joint, increasing its range of motion. These techniques are often performed with the patient in a relaxed position, allowing the therapist to move the joint within a desired range that would otherwise be restricted due to pain. Manipulations help get the joint moving and can be particularly beneficial in reducing joint pain or stiffness.
Massage
Massage is another essential component of physiotherapy treatment for muscle imbalance. Specialized manual massage techniques such as myofascial release can be applied to increase the range of motion and speed up recovery. Massage is often combined with other treatments, such as ice, heat, and ultrasound, to address inflammation or injury contributing to muscle imbalances.
It is important to follow the therapist's instructions and continue the provided home routine to prevent muscle imbalances from recurring and to maintain proper muscle balance and overall health.
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Frequently asked questions
A muscle imbalance occurs when the relationship between the tone, strength and length of muscles around a joint is altered.
Symptoms of a muscle imbalance in the shoulder include pain, poor posture, and injury. In the early stages of an imbalance, there may be no symptoms, but as the condition progresses, pain may be felt within the shoulder joint during exercise or everyday tasks.
A muscle imbalance in the shoulder can be caused by unbalanced training regimes, training for a particular sport, work-related tasks, poor posture, or pre-existing shoulder injuries.
Physiotherapy is essential in the treatment of muscle imbalance in the shoulder. A physiotherapist will assess the strength or tone and length of the muscles in the shoulder complex and prescribe stretches for tight muscle groups and strengthening exercises for weak muscle groups.
If left untreated, a muscle imbalance in the shoulder can lead to long-term problems such as chronic impingement of the shoulder, which accounts for 44-65% of shoulder complaints during physician visits.









































