Genu Varum (Bow Legs) in Children: Physiotherapy Treatment & Exercise Guide

Genu Varum in Children: A Parent's Guide to Physiotherapy

Genu varum — commonly called 'bow legs' — describes an outward curvature of the legs when standing with feet together. While concerning to parents, understanding normal developmental timelines is essential before treatment.

Normal Development vs. Pathological Varus

Children's leg alignment naturally progresses through phases:

• Birth to 18 months: Moderate varus (bow legs) is normal
• 18–36 months: Gradual correction toward neutral as the child begins weight-bearing
• 3–4 years: Neutral alignment or mild valgus (knock-knees — the next phase)
• 6–7 years: Adult-like alignment

When genu varum persists or worsens after age 2, or is asymmetric (only one leg affected), a thorough assessment is warranted.

Physiotherapy Assessment Approach

1. Intercondylar distance measurement: Distance between medial femoral condyles when standing with feet together
2. Tibial torsion assessment: Thigh-foot angle in prone lying
3. Hip rotation range: Internal/external rotation range in prone
4. Foot assessment: Metatarsus varus, foot pronation
5. Functional gait analysis: Watch for Trendelenburg gait or in-toed pattern

Physiotherapy Treatment for Functional Genu Varum

1. Hip Abductor Strengthening

Side-lying hip abduction: 15 reps × 3 sets daily. Strengthens gluteus medius, which controls the pelvis and reduces compensatory tibial internal rotation that worsens apparent varus.

2. Hip External Rotation Exercises

Seated external rotation (child seated, rotate feet outward): develops rotational muscle memory.

3. Clam Shell Exercise

Side-lying with hips and knees bent 45°. Open top knee like a clamshell while keeping feet together. 15 reps × 3 sets. Direct glute med activation.

4. Foot Arch Strengthening

Towel scrunching with toes, single-leg standing on cushion. Addresses foot pronation that internally rotates the tibia.

5. Balance & Weight-Bearing Training

Single-leg stance with correct alignment coaching. Develops proprioceptive awareness of neutral knee alignment.

When to Refer to Pediatric Orthopedics

• Worsening asymmetric varus after age 2
• Suspected Blount's disease (tibial metaphyseal beaking on X-ray)
• Suspected rickets (wide growth plates, delayed walking)
• Intercondylar distance >7cm in a 3-year-old