Hallux valgus deformity and postural sway: a cross-sectional study

Area of Science:

• Biomechanics
• Orthopedics
• Gerontology

Background:

• Hallux valgus is a common foot deformity.
• Previous studies suggest a link between hallux valgus and increased postural sway, but findings are inconsistent.
• This study investigates the relationship between hallux valgus and postural sway using objective measurements.

Purpose of the Study:

• To assess the association between hallux valgus deformity and postural sway.
• To determine the direction and magnitude of postural sway related to hallux valgus.
• To explore the correlation between hallux valgus severity, postural sway, and lower limb muscle mass.

Main Methods:

• 169 healthy volunteers over 40 years old participated.
• Measurements included photographic hallux valgus angle, postural sway (using a force plate), hallux pain, and lower limb muscle mass.
• Participants were categorized into hallux valgus (angle ≥ 20°) and no hallux valgus groups.

Main Results:

• Anteroposterior postural sway was significantly greater in the hallux valgus group compared to the no hallux valgus group.
• Lower limb muscle mass was significantly lower in the hallux valgus group.
• Hallux valgus severity positively correlated with anteroposterior postural sway and negatively with lower limb muscle mass.

Conclusions:

• Hallux valgus deformity is positively associated with increased anteroposterior postural sway.
• The severity of hallux valgus is independently related to the magnitude of anteroposterior postural sway.
• Reduced lower limb muscle mass may contribute to the observed sway in individuals with hallux valgus.