Is trying to achieve symmetry important?

It’s a topic I’ve thought a lot about over the years and, like a pendulum, I keep moving between the two extremes of treating symmetry as a therapeutic ideal but then accepting that the human body is inherently, beautifully and wonderfully asymmetrical. So, is bodily symmetry really an achieveable goal? Is it even important?

A research‑based look at an old idea...

“Helping the body achieve symmetry” is a phrase that appears often in bodywork, rehabilitation, and movement circles. It sounds intuitively right: two sides, matching perfectly, moving in harmony. But when you step into the research on biomechanics, gait, and adaptation, a different picture emerges. Healthy humans are not perfectly symmetrical, and the body seems far more interested in resilience and efficiency than in mirror‑image perfection.

This article takes a researcher’s view of symmetry and asymmetry in the body, especially in gait and load distributio, and asks a simple question: is symmetry truly vital for health, or have we over‑romanticised it?

Firstly, what do we actually mean by “symmetry”?

In biomechanics, symmetry usually refers to similarity between the left and right sides in structure or function. That might mean equal step length and timing in gait, similar joint angles during movement, or comparable forces under each foot. Asymmetry, then, is any measurable difference between sides—whether in bone length, muscle strength, joint range, neuromuscular control, or movement pattern.

Crucially, asymmetry is not automatically pathological. Humans are lateralised: we have a dominant hand, a preferred kicking leg, and habitual patterns shaped by work, sport, and life history. These leave traces in our tissues and movement. The question is not “is there asymmetry?” but “what does this asymmetry mean in terms of load, adaptation, and symptoms?”

The classic example - gait symmetry

Gait is one of the most studied human movements, and it is often described—especially in clinical literature—as “typically symmetrical” in healthy walkers. A recent narrative review in Frontiers in Rehabilitation Sciences summarises over 150 studies on how researchers deliberately induce asymmetric gait in healthy people, mainly to model or prepare for clinical conditions such as stroke or amputation. The authors note that gait symmetry has long been considered a hallmark of healthy walking, and that pathological conditions often introduce marked asymmetries in spatial and temporal parameters of gait.

However, when you look more closely at how symmetry is measured, the picture becomes more nuanced. Different “symmetry indices” can give different answers, and symmetry itself turns out to be speed‑dependent and metric‑dependent. A study in Scientific Reports (Nature portfolio) showed that gait symmetry values change with walking speed and with the specific index used, highlighting that there is no single, universal “symmetry score” that defines healthy gait.

In other words, even in the domain where symmetry is most celebrated- i.e. walking - what counts as “symmetric” is not as clear‑cut as it first appears.

Asymmetry as an adaptation, not a defect

A key theme in recent work is that asymmetry often reflects adaptation. When researchers experimentally create functional asymmetry, by constraining one knee to mimic hemiparetic gait, for example—healthy participants reorganise their movement patterns to preserve stability and energetic efficiency. A 2025 study in Frontiers in Bioengineering and Biotechnology used a unilateral knee constraint and found that participants prioritised maintaining step length symmetry while allowing propulsion forces to become more asymmetric. The authors interpreted this as the nervous system choosing the pattern that best balances energy cost and stability, even if that means tolerating kinetic asymmetry.

This is a powerful insight: the body is not blindly chasing symmetry. It is solving a multi‑objective problem—stay upright, move forward, minimise energy cost, protect vulnerable tissues—and asymmetry is one of the tools it uses to do that.

Other work shows how easily gait patterns can be nudged into more or less symmetry using cues. A 2024 study in Biomechanics used an asymmetrically walking visual avatar as a cue and showed that many healthy adults could synchronise to this cue and adopt more asymmetric gait patterns, while others did not respond. This variability again suggests that there is no single “correct” symmetry pattern; instead, individuals have their own attractors and limits.

When asymmetry becomes clinically relevant

None of this means asymmetry is irrelevant. The same Frontiers review on induced asymmetric gait emphasises that pathological asymmetry—such as after stroke, cerebral palsy, or limb loss—is associated with higher metabolic cost, increased risk of osteoarthritis, and low back pain. In these contexts, asymmetry is not just a benign variation; it is part of a pattern of overload and reduced efficiency.

Clinically, asymmetry tends to matter when it leads to:

• disproportionate loading of one limb or region, exceeding tissue tolerance over time

• compensatory patterns that restrict movement variability and adaptability

• clear associations with pain, fatigue, or functional limitation

  
  

In high‑performance sport, even relatively small asymmetries can influence performance or injury risk, particularly when repetitive, high‑load tasks are involved. But even there, some asymmetries are sport‑specific adaptations—think of a tennis player’s serving arm or a footballer’s kicking leg—and attempts to “normalise” them without considering function can be counterproductive.

Symmetry as a clinical goal: helpful or misleading?

Historically, many rehabilitation and bodywork approaches have treated symmetry as an implicit goal: equal leg length, level pelvis, balanced shoulders, mirrored ranges of motion. This has intuitive appeal and is easy to communicate to clients. But the research suggests that “chasing symmetry” as an abstract ideal is too simplistic.

First, healthy populations show measurable asymmetries in joint kinematics, ground reaction forces, and timing, even in the absence of pain or pathology. Second, the nervous system appears willing to trade symmetry for other priorities such as stability and energy efficiency. Third, the metrics we use to quantify symmetry are themselves variable and context‑dependent.

A more evidence‑aligned stance is to treat symmetry as one possible marker among many, rather than as a universal target. The key questions become: does this asymmetry correspond to increased load on vulnerable tissues? Does it correlate with the person’s symptoms or limitations? Does modifying it (through training or manual therapy) actually improve function or reduce pain?

Links to tensegrity and whole‑system thinking

If you view the body as a tensegrity‑like system—a network of continuous tension and discontinuous compression—then symmetry becomes less about matching left and right components and more about how forces are distributed through the whole structure. In such a system, local asymmetry can coexist with global balance. A slightly more loaded right hip, for example, might be offset by subtle adjustments in trunk rotation, foot placement, or fascial tension elsewhere.

The gait studies mentioned above fit this picture well. When one element is constrained or weakened, the system reorganises: step length, push‑off force, trunk motion, and timing all shift to maintain overall function. The resulting pattern may look more asymmetric on paper, but it may be the most economical and stable solution available to that individual at that moment.

From this perspective, the clinical task is not to enforce geometric symmetry but to support the system in finding a configuration where loads are tolerable, movement is adaptable, and the person can do what they value with minimal pain.

Practical implications for bodyworkers and movement practitioners

For hands‑on practitioners and movement educators, the research suggests a few shifts in emphasis.

First, treat visible or measurable asymmetry as information, not as a diagnosis. It is a clue about how the system is organising itself, not proof that something is “wrong.”

Second, pay close attention to the relationship between asymmetry and experience: does the more loaded or more restricted side correspond to pain, fatigue, or functional complaint? If not, it may be an adaptive pattern that does not need correction.

Third, when you do choose to work with asymmetry (through manual techniques for example) evaluate outcomes in terms of function, comfort, and robustness, not just visual alignment. Studies using visual cues and split‑belt treadmills show that gait patterns can be altered, but the meaningful question is whether those changes reduce metabolic cost, improve stability, or lessen symptoms, not simply whether the symmetry index improves.

Finally, be cautious about promising clients that you will “make them symmetrical.” A more accurate and research‑aligned narrative is that you are helping their body distribute forces more intelligently, move with more options, and adapt more easily to the demands of life.

Asymmetry and low-back pain...

In the document “Postural asymmetry in low back pain – a systematic review and meta-analysis of observational studies”  the review examined 46 studies (over 12,000 participants) comparing people with and without low back pain. It concluded:

• Most postural asymmetries showed no significant difference between people with and without low back pain.   (Leg length discrepancy, thoracic kyphosis, sacral slope, lumbar lordosis — all showed no meaningful difference.)

• Only pelvic tilt showed a small statistical difference, and even that finding had high heterogeneity, meaning it was inconsistent across studies.

• The authors explicitly state that no firm conclusions can be made about posture or asymmetry as a cause of low back pain. Source

  
  

So, is symmetry a big deal?

If we define “vital” as “required for health,” the answer from current biomechanics and gait research is no: perfect left–right symmetry is not required for healthy movement. Healthy people are measurably asymmetric, and the nervous system often uses asymmetry as a functional solution rather than treating it as an error.

Symmetry becomes important when asymmetry is large, uncompensated, and clearly linked to overload, inefficiency, or pain—especially in neurological or orthopaedic conditions. In those cases, targeted work to reduce harmful asymmetries can be valuable. But as a general principle for all bodies, “achieving symmetry” is too blunt an instrument.

A more nuanced, evidence‑based framing might be this:

The goal is not symmetry, but resilient, adaptable organisation.

Symmetry is sometimes a by‑product of that, sometimes not. The art (and science) of bodywork lies in knowing the difference. In the end, the more I study and learn, the more I see that problems arise from the rare moments when the pendulum swings too far and the system loses its ability to adapt.