Introduction
- Have you ever noticed one shoulder sitting higher than the other in photos?
- Why does one side of your body always seem tighter, weaker, or less coordinated?
Do you know that sometimes, while dealing with a problem, your body compensates by creating new problems elsewhere?
Yes, that’s true.
And to understand it better, you first need to know what muscular imbalances are.
Research shows that muscle imbalance simply means that one side of your body or one particular muscle group is doing more work than its opposite partner. (Chamberlain et al., 2013a)
Did you know that your body has two types of muscle groups in each part, and both work in opposite directions?
For example, the biceps muscle bends your arm, and triceps straighten your arm. When both work together and equally, you have smooth movement of your arm. (Snell, 2018)
But if any one of these two opposite muscle groups starts working more compared to the other one, problems start arising, and this is what we call muscular imbalance, and it can lead to body asymmetry and strength imbalance. (Chamberlain et al., 2013a)
Some injuries also create compensation patterns, and your body protects the injured area by shifting the load elsewhere.
When that pattern is repeated thousands of times over weeks, compensation patterns develop, and it changes movement habits and body structure. (Chamberlain et al., 2013a)
Research published in 2025 showed that when muscular imbalances create movement restrictions or side-to-side asymmetry, injury risk increases by around 15 percent. (Zhou and Liu, 2025) This highlights the real muscle imbalance risks.
Muscular imbalance and body asymmetry can cause pain, weakness, difficulty in everyday movements, and poor efficiency. According to the National Health Services
(NHS) UK, untreated muscular imbalances can lead to chronic pain and functional difficulties. (NHS, 2022) These are well-known muscle imbalance risks.
Stay with me, and I’ll guide you step by step on how you can address this problem and get your body symmetry back.
What are muscular imbalances actually?
Think of what imbalance means. Two things are not equal. Right?
Now think of a rope that is pulled at each end by two persons.
If both persons exert an equal amount of force, where would the rope go?
It’ll remain static. Yes, you got that right.
But if one person is weak compared to the other person, the stronger person will move the rope towards their side.
The same thing happens with muscles. One muscle group pulls the body part to one side while another’s job is the opposite.
For example, there are two important muscle groups around your elbow, i.e., the biceps and Triceps.
If you want to bend your elbow, this is done by the biceps, and for the biceps to be able to bend your elbow, the triceps muscles need to relax/lower their force.
This is called the group action of muscles. (Gardiner, 2017)
But if there is a muscular imbalance between these two muscle groups, the biceps muscles may not relax, and bending your elbow might be difficult.
Another situation could be your one shoulder feeling slightly higher than the other.
AND the most important thing you must know is that to deal with these muscular imbalances, you need a CUSTOMISED PLAN.
Think of two people having pain in shoulder.
Detailed assessment revealed the cause of pain in the first person to be weakness of rotator cuff muscles, whereas the other person had a torn rotator cuff tendon.
The first person will need strengthening exercises for weak muscles, while the other person needs REST.
IMAGINE what would happen if the person with an already torn tendon started performing the same exercises that the first person is performing.
That’s why assessment and CUSTOMISATION are important.
Now you must be wondering about the causes of muscular imbalance.
The causes of muscular imbalances develop gradually. It doesn’t happen overnight.
Below are some of the most common causes that you must know.
1. Unilateral loading
If you load only one side of your body for a long time, i.e., unilateral loading, this can be a contributing factor.
For example:
- Carrying a handbag on one shoulder
- Holding a child on the same hip
2. Poor posture habits
Another reason can be your poor posture habits.
For example:
- Sitting slouched at a desk
- Leaning on one elbow
- Standing with weight always on one leg
3. Compensation after injury
Muscle imbalance and asymmetry can occur when the body tries to compensate following an injury.
For example, after an ankle sprain, the opposite leg often does more work, and after some weeks, strength and control remain uneven even when pain has gone.
4. Repetitive work patterns
Another common reason is the repetitive work pattern.
For example, driving long hours with one hand can overload one shoulder, wrist, or hip repeatedly.
5. Training bias
In persons with daily exercise patterns, always starting sets with the same side and favouring dominant limbs can also be a cause of muscular imbalance.
6. Foot and lower limb mechanics
Did you know that sometimes foot problems like plantar fasciitis often cause people to offload the painful foot, leading to hip and back asymmetry?
7. Structural and developmental factors
Some structural changes in the body, like scoliosis creates natural asymmetry in the spine, often leading to uneven rib, hip, and shoulder muscle activity.
Why do all these causes matter?
A research study of elite athletes found that players with untreated strength imbalances had a significantly higher muscle injury risk. (Croisier et al., 2008)
Do you know how much risk?
The risk is up to about 2.9 times greater compared with those without imbalances.
Understanding these patterns and common imbalance habits is the first step toward safer, more balanced movement. Research indicates that identifying these imbalance patterns early can significantly reduce the risk of musculoskeletal injuries. (MayoClinic, 2022)
How muscular imbalances affect movement and increase injury risk
Now, when you are familiar with the muscular imbalances and their causes, I want you to understand how muscular imbalance can affect your movement, i.e., the effects of muscular imbalance.
And when your movement is affected, the risk of an imbalance injury increases.
Whenever there is a muscular imbalance, it changes how force moves through your body.
When one side or muscle group dominates, forces are no longer shared evenly across joints.
This results in your joints getting loaded unevenly, and it disrupts joint loading mechanics. (Lee and Lee, 2002)
And do you know what makes most of the difference?
Some tissues in your body absorb stress repeatedly, while others remain underused.
Over time, this imbalance leads to movement inefficiency, and movements are no longer efficient. Musculoskeletal rehab guidelines suggest that correcting asymmetries improves coordination and prevents repetitive strain injuries. (MayoClinic, 2022)
If you throw a stone in water, what happens?
Water reacts, and ripples are produced.
Muscles and bones of your body also react when they are unevenly loaded.
Overworked muscles get tight and lose their elasticity (reduced elasticity). On the other hand, underused muscles weaken and get loose. (Bhimani et al., 2021)
The muscles that are tight (spasm) may have reduced blood flow, and this reduced circulation affects the healing capacity of the body and overall tissue health. This causes a reduction in healthy metabolism within the affected area and reduced healing capacity.
This is the reason why muscular imbalance is linked to a wide range of problems.
If this muscular imbalance is seen in the spine, uneven load and stability deficits can cause lower back pain, intervertebral disc irritation, and herniated disc symptoms.
You can also feel symptoms of sciatica.
In scoliosis, there is already an existing structural asymmetry, and it is further reinforced by muscle dominance.
This muscular imbalance is a problem in the hips and knees, which can cause hip or knee pain.
In the foot and ankle, plantar fasciitis can develop when one side repeatedly absorbs more impact during walking.
What I want you to understand is that the key issue is not weakness alone, but the imbalance injury risk created by poor coordination and stability.
People who sit for long hours, train regularly, or have a history of injury benefit most from identifying these patterns early.
“Here’s what Jessica has to say about her transformation after following my plan.
- As a result of working with Jazz, I have a lot more energy, am stronger and fitter, and am much more toned than before.
- My upper body endurance has increased between 200 to 300 %.
- I am much more toned in my core/stomach, legs, and arms.
- In fact, my muscle tone has increased by about 200%, and my body coordination, endurance, and stamina have all increased by 100%.
- My happiness level has increased 200%.”
How to identify your own muscular imbalances at home
Do you feel you have a muscular imbalance, too?
Do you want to know how to test muscular imbalance?
No need to worry. You can identify your own muscular imbalance at home (if there is any).
First of all, you need to start with a side-to-side strength check.
- Sit comfortably on a chair and perform single leg sit-to-stands on each side.
- You should notice if one side feels weaker or harder to control.
Next, look for mobility asymmetry.
- For example, compare how far each shoulder reaches overhead. Or how far you can move your leg while lying down.
- If there are differences, it signals a muscular imbalance.
A third option is balance testing.
- Stand on the right leg for 20–30 seconds and then do the same on the left leg. Observe whether one side feels weak or fatigues faster.
These methods offer a basic self assessment muscle balance and help you understand how to test muscular imbalance safely. The NHS, UK, suggests that even simple at-home assessments can provide initial insight, but professional evaluation is recommended. (NHS, 2024a).
But you MUST know that they do not reveal deeper coordination issues of your body.
Only a comprehensive, detailed movement assessment done by an experienced personal trainer can reveal hidden compensation patterns developed over time.
If these self-tests signal a muscular imbalance, it is high time that you consider seeking professional advice.
Dealing with Muscular Imbalances: Why CUSTOMISATION is important?
My years of experience in dealing with people from diverse backgrounds have taught me one thing.
YOU SHOULD NEVER PRESCRIBE AN EXERCISE WITHOUT PROPER ASSESSMENT
And I make sure that each of my exercise or rehab plans is CUSTOMISED.
Research and the National Institute for Health and Care Excellence (NICE) guidelines recommend assessment-based exercise prescription for safe rehabilitation. (NICE, 2020)
To help you understand it better, I want you to think of two people who are seeking personal training because of their knee pain that is making their walk difficult.
One assumption that can be made from this history is that both persons have weak knee musculature, and if we somehow strengthen these muscles, the problem will be solved.
But when we do a detailed assessment of both persons, it is found that one person has a torn anterior cruciate ligament (ACL) in the right knee, while the other person has just weak knee muscles.
See?
Now, the rehab plan of both persons will be entirely different, and if both persons start performing the same set of exercises, they will not benefit at all.
Another scenario could be that one person had a stress fracture of his femur bone, and in this case, he needs to be referred immediately to a concerned doctor for management.
You can imagine the consequences if a person keeps exercising with a fractured bone.
- The customisation of this programme was so focused that, in only a few sessions, I began to feel the benefits very clearly.
- I feel my strength has improved hugely, and more than this, my confidence in my movement has improved.
- I saw more muscle development, and I was becoming leaner and more toned.
- I found my posture was more upright and I had more control over my body.”
I hope you now understand why I strongly emphasize the importance of customisation and detailed assessment.
How to fix muscular imbalances safely through structured exercise
If you want to fix a muscular imbalance, you need to know three important things. (Chamberlain et al., 2013b)
- Targeted Activation
- Mobility Correction
- Movement Retraining
These are the main pillars and must be structured around these.
Study emphasizes structured, progressive exercises tailored to the individual, aligning with NICE and NHS guidelines for musculoskeletal health. (NHS, 2024b)
The first pillar is the targeted activation.
As I told you earlier, there is a balance of forces between two muscle groups. If one group of muscles is weak, this creates a muscular imbalance, and we need to target that “weak muscle”.
The focus of exercise should be on activating and strengthening the particular weak muscle group that has resulted in
The second pillar is mobility correction.
Being an experienced elite personal trainer in London and the only one trained in injury rehabilitation and also working with Olympic athletes, I know the fact that muscles never get tight without a reason.
Most of the time, the main reason is to guard unstable joints.
Improving your hip joint mechanics, thoracic mobility, and ankle motion allows joints to move through different ranges without excessive strain.
The third pillar is movement retraining through progressive functional training. This is where knee alignment, load distribution, and sequencing are rebuilt during real-world tasks like lifting, stepping, and reaching.
The nervous system must learn new patterns under controlled load to prevent old habits from returning.
Here’s where customisation becomes non-negotiable.
No two bodies compensate the same way, even with similar symptoms.
Why personalised assessment and customised programming work does not cause injuries compared to YouTube general workouts
The most important thing you must know is that a personalised exercise programme is safer because no two bodies move the same way.
Even during the same exercise, different people use completely different muscles depending on their history, stiffness, strength, past injuries, and habitual patterns.
Who Is Jazz Alessi?
Jazz Alessi is the elite rehabilitation focused personal trainer London clients trust when they need precise movement correction. Jazz has a solid background in training athletes, special forces, but also rooted in Pilates-based control, functional strength, and injury-informed exercise programming, and he specialises in identifying the small biomechanical details that commonly drive muscular imbalances and structural compensation.
His approach is mainly focused on movement optimisation, building a suitable bridge towards performance, analysing how your body loads, where it overworks, and which patterns need retraining to restore balance and efficiency.
Jazz has years of experience working with diverse asymmetries, from postural shifts to unilateral weaknesses, and he informs his step-by-step strategy for rebuilding strength and performance safely. Jazz’s method emphasises postural correction, targeted activation, and customised progressions so no exercise is wasted and no movement reinforces imbalance.
If you want training built entirely around your body’s structure, limitations, and goals, book a personalised assessment with Jazz and start your correction journey the right way.
FAQs
Can muscular imbalances fix themselves over time?
No. If you do not change how you move, the body keeps repeating the same patterns, allowing the imbalance to persist or worsen.
Is it safe to train with a muscular imbalance?
You can train, but carefully. Poor mechanics increase strain on joints and soft tissues, so exercise selection and technique matter a lot.
What results can I realistically expect from in-person back rehabilitation?
You can expect better movement control, reduced compensation, improved posture, steadier strength, and fewer flare-ups.
How long does it take to correct a muscle imbalance?
Most people notice early changes in 4–8 weeks, but full correction depends on severity, consistency, and how well exercises match your needs.
What exercises should I avoid with an imbalance?
You should avoid exercises that load your dominant side heavily, involve twisting under strain, or reinforce the same faulty pattern you are trying to fix.
Do imbalances cause recurring tightness or one-sided pain?
Yes. Overworked tissues tighten to stabilise weak areas.
When should I get a personalised assessment?
If pain is recurring, strength feels uneven, or your form collapses under load, it is the right time for a structured movement assessment.
Conclusion
Muscular imbalances and body asymmetries are not flaws. They are simply the result of how your body has adapted over time. The safest and most effective way to correct them is through a clear sequence.
A detailed movement assessment à a customised exercise plan àconsistent long-term guidance to refine technique.
When you understand how your body moves, progress becomes predictable and empowering. If you are ready to take the next step, a personalised assessment is the smartest place to start.
References
- BHIMANI, R., PUNJANI, B. & PEDEN-MCALPINE, C. 2021. Understanding clinical characteristics of muscle weakness. Journal of Neuroscience Nursing, 53, 69-74.
- CHAMBERLAIN, A., MUNRO, W. & RICKARD, A. 2013a. Muscle imbalance. Teoksessa S. Porter (toim.) Tidys Physiotherapy, 15, 305-329.
- CHAMBERLAIN, A., MUNRO, W. & RICKARD, A. 2013b. Muscle imbalance. Tidy’s Physiotherapy. Churchill Livingstone.
- CROISIER, J.-L., GANTEAUME, S., BINET, J., GENTY, M. & FERRET, J.-M. 2008. Strength imbalances and prevention of hamstring injury in professional soccer players: a prospective study. The American journal of sports medicine, 36, 1469-1475.
- GARDINER, M. D. 2017. Principles of exercise therapy, CBS Publishers & Distributors Pvt Ltd.
- LEE, Y.-H. & LEE, T.-H. 2002. Human muscular and postural responses in unstable load lifting. Spine, 27, 1881-1886.
- MAYOCLINIC. 2022. Musculoskeletal Care Overview [Online]. Available: https://www.mayoclinic.org/departments-centers/musculoskeletal-care/overview/ovc-20549492 [Accessed].
- NHS. 2022. Musculoskeletal health: applying All Our Health [Online]. Available: https://www.gov.uk/government/publications/musculoskeletal-health-applying-all-our-health/musculoskeletal-health-applying-all-our-health?utm_source=chatgpt.com [Accessed].
- NHS 2024a. Get NHS help for back or joint problems.
- NHS. 2024b. Musculoskeletal health [Online]. Available: https://www.england.nhs.uk/elective-care/best-practice-solutions/musculoskeletal/ [Accessed].
- NICE 2020. Low back pain and sciatica in over 16s: assessment and management. Journal of Physiotherapy, 63, 120.
- SNELL, R. S. 2018. Snell’s Clinical Anatomy, Wolters Kluwer India Pvt Ltd.
- ZHOU, S. & LIU, H. 2025. Injury risk analysis of movement restriction and body asymmetry in sports injury prediction. BMC Sports Science, Medicine and Rehabilitation.