What are Bow Legs and Ways to Correct Bow Legs
Bow legs, clinically known as genu varum, are one of the more common lower limb conditions observed in musculoskeletal physiotherapy. It is characterised by an outward curvature of the legs that leaves a visible gap between the knees even when the feet are together, and it can affect anyone from young children to active adults.
While bow legs in young children often resolve on their own, cases that persist beyond early childhood or that develop in adulthood warrant proper clinical evaluation. Left unaddressed, the altered alignment places excess stress on the knee, hip, and ankle joints, which can affect mobility and long-term joint health. Early awareness and timely assessment are therefore key to preventing severe complications.
Understanding Bow Legs (Genu Varum)
Understanding the meaning of bow legs goes beyond their appearance. Bow legs occur when the outward angulation of the thigh bone (femur) and shin bone (tibia) creates a noticeable gap between the knees during standing, even when the feet and ankles are together. This misalignment is visible in standing posture and may also affect walking, often causing a slight lateral shift in weight distribution through the legs.
A common cause of bowed legs in early childhood is foetal positioning in the womb. The legs naturally curve outward during this stage, and in most cases, this corrects itself as the child begins to walk and the body develops, typically by ages three to four. In older children and adults, however, persistent or worsening bowing may indicate underlying structural or biomechanical factors warranting professional assessment.
When assessing bow legs, a clinician will typically evaluate the following:
- Visual assessment: Leg alignment is observed in standing and walking to gauge the degree and symmetry of the curvature.
- Gait analysis: Walking patterns are reviewed for compensatory movements at the hip, knee, or ankle.
- Symptom evaluation: The location and nature of any pain are noted, as these often indicate areas of excessive joint load.
- Range of motion assessment: Lower limb joint mobility is assessed for restrictions linked to the bowing.
- Symmetry analysis: Uneven bowing between the legs may indicate an underlying cause requiring further investigation.
When You Should Seek Physiotherapy or Medical Assessment
Not every case of bow legs requires immediate intervention, but the following situations are worth having assessed by a professional:
- Bowing that persists beyond age four in children
- A curvature that appears to be worsening, or that develops suddenly in an older child or adult
- Ongoing pain in the knees, hips, or ankles that is not linked to a specific injury
- Difficulty with walking, running, or maintaining balance
- Concerns in adults about how leg alignment may be affecting joint health or physical performance
Seeking an early assessment can make a difference, allowing for targeted management before secondary issues develop.
Why Correcting Bow Legs is Important and How to Address It
The consequences of unaddressed bow legs go beyond appearance. Here is what can happen when the condition is left unmanaged:
- Uneven joint loading: Misaligned knees shift excess load onto the medial meniscus, the cartilage that cushions and stabilises the knee, increasing the risk of degeneration and early-onset medial knee arthritis.
- Compensatory strain elsewhere: The body adapts to the misalignment by making adjustments at other joints, which can result in IT band tightness, hip abductor fatigue, ankle pronation, and lower back strain.
- Reduced mobility and quality of life: Without intervention, these compounding issues can affect how well a person moves and functions day to day.
The good news is that bow leg correction without surgery is achievable for many individuals, especially when intervention begins early. The right approach will depend on the individual: their age, the severity of the curvature, their symptoms, and their overall biomechanical profile. For children, conservative monitoring is usually the first step. For adolescents and adults, a physiotherapy programme forms the foundation of non-surgical management.
Physiotherapy for Bow Legs
Bow leg therapy through physiotherapy1 takes a whole-body approach, addressing not just the visible curvature but the underlying muscle imbalances, movement patterns, and biomechanical factors that contribute to it. The goal is to improve alignment, restore muscular balance, and reduce the mechanical stress placed on the joints.
During physiotherapy in Singapore, the following treatment modalities may be used as part of an individualised programme:
- Stretching: Tightness in the inner thigh muscles reinforces the inward pulling force across the knee. Targeted stretching of these muscles helps reduce tension, improve flexibility, and support more balanced lower limb alignment, while easing compensatory strain on the hip flexors and medial knee stabilisers.
- Strengthening: Targeted bow-leg exercises focusing on the gluteus medius and tensor fasciae latae strengthen the hip abductors and external rotators, counteracting the femur’s inward drift. As hip strength improves, walking patterns often normalise, and uneven joint loading is reduced.
- Dry Needling: A dry-needling treatment uses fine, sterile needles to release trigger points; tight spots in the muscle that cause pain and restrict movement. It may be helpful for chronic tightness in the hip, thigh, and knee that does not respond to stretching.
- Shockwave Therapy: Shockwave therapy uses focused acoustic waves to stimulate tissue repair, promote blood flow, and break down fibrotic tissue. At a sports injury clinic in Singapore, it is a non-invasive option for adults with chronic soft-tissue changes that are limiting rehabilitation progress.
- Custom Orthotics: Custom orthotics correct foot and ankle positioning at ground level, reducing stress on the knees and hips and reinforcing the alignment goals of the physiotherapy programme. They also help prevent future complications from poor gait mechanics.
Surgical Options When Bow Legs Persist
When conservative management is insufficient, surgery may be considered. Osteotomy (the cutting and realignment of the femur or tibia) is typically recommended once growth plates have closed and bowing is causing significant functional impairment.
Limb lengthening procedures2 may be indicated when there is a notable leg-length discrepancy alongside malalignment. In both cases, structured post-surgical rehabilitation under the guidance of a physiotherapist is recommended to restore strength, mobility, and function.
Take the Next Step Towards Better Alignment
Bow legs, left unmanaged, can contribute to joint degeneration, chronic pain, and reduced mobility, but with the right intervention, many of these outcomes are preventable. Whether through surgery or a non-surgical approach, effective management options exist at every stage. Early professional evaluation is the first step towards a personalised approach before complications arise.
References
- Nandanwar, R., Uttamchandani, S., Deshmukh, M., & Chitale, N. (2021). Physiotherapy rehabilitation in patient with bow leg deformity. Journal of Medical Pharmaceutical and Allied Sciences, 10(4), 3214–3217. https://jmpas.com/abstract/621
- Saleh, M., Fernandes, J. A., Kaufman, S. D., Fagg, J. A., Jones, S., & Bell, M. J. (2012). Limb lengthening in congenital posteromedial bow of the tibia. Strategies in Trauma and Limb Reconstruction, 7(3), 147–153. https://doi.org/10.1007/s11751-012-0145-4
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Meet Our Physiotherapist
This article is written by Ng Hong Kai, our Clinic Director and Chief Physiotherapist
Clinic Director and Chief Physiotherapist
- Master of Clinical Physiotherapy (Musculoskeletal), Curtin University (Australia)
- Master of Physiotherapy, University of Sydney (Australia)
- Bachelor of Applied Science (Exercise & Sports Science), University of Sydney (Australia)
- Member of Australian College of Physiotherapists and Australian Physiotherapy Association
- Full registration with Allied Health Professions Council, Singapore, and Australian Health Practitioner Regulation Agency
- GEMt Certified Dry Needling Practitioner
Hong Kai has been practising musculoskeletal physiotherapy for more than a decade. He is the first Singaporean to achieve dual credentials as both an APA Titled Musculoskeletal Physiotherapist and a tertiary trained Exercise Scientist.
Hong Kai's broad and extensive skillset allows him to create solutions that are simple, effective and tailored to a client’s musculoskeletal needs. His beliefs in continuing education and self improvement led him to complete his Masters in Clinical Physiotherapy (Musculoskeletal), where he had a chance to participate in formal research into knee osteoarthritis under the supervision of world renowned researcher and physiotherapist Prof Peter 0′ Sullivan.
Hong Kai has experience treating a variety of musculoskeletal conditions, with a specific focus on addressing lower back, neck, shoulder and knee pain.