Effect of footwear habits on hallux valgus angle
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Footwear Habits and Hallux Valgus Angle in Children
Research consistently shows that children who wear shoes that are too short are at a higher risk of developing an increased hallux valgus angle, which is a lateral deviation of the big toe. Large studies in both Austria and Japan found that the shorter the shoe relative to the foot, the greater the hallux valgus angle observed in children. Most children in these studies wore shoes that were too short, and the risk of developing a hallux valgus angle of 4 degrees or more was significantly higher in those with poorly fitting footwear. Notably, children who went barefoot had significantly smaller hallux valgus angles compared to those who habitually wore shoes, suggesting that barefoot habits may help counteract the negative effects of ill-fitting footwear on toe alignment 125.
Footwear Fit and Hallux Valgus in Adults
In adults, especially women, footwear habits also play a significant role in the development of hallux valgus. Studies have found that wearing high-heeled shoes or shoes with a narrow toe box is associated with a higher incidence of hallux valgus. Women who wore high heels or shoes with a very narrow toe box in early adulthood were more likely to develop hallux valgus later in life. The risk increased with the degree of constriction in the toe box and the height of the heel, highlighting the importance of shoe design in foot health 39.
Biomechanical and Anatomical Insights
Biomechanical analyses and comparative studies between barefoot and shod populations support the idea that footwear, especially shoes that constrain the medial side of the foot, increases stress on the first metatarsophalangeal joint. This stress can lead to the development and progression of hallux valgus. Finite element modeling has shown that even small increases in the hallux valgus angle result in higher stress concentrations when shoes restrict the natural movement of the big toe. Over time, this can contribute to the deformity 710.
Population and Regional Differences
Large-scale studies using 3D foot scans have shown that hallux valgus angle varies widely across populations, with females and people from Asia tending to have larger angles. These differences may be partly due to regional footwear habits and shoe design, emphasizing the need for shoes that accommodate the natural shape of the toes to prevent deformities .
The Importance of Proper Footwear Fit
Across all age groups, the evidence points to the importance of wearing shoes that fit properly in length and width. Poorly fitting shoes, especially those that are too short or have a narrow toe box, are a clear risk factor for developing hallux valgus. This is particularly important during periods of rapid foot growth in children and during early adulthood in women, when the risk of developing foot deformities is highest 1259.
Conclusion
Footwear habits, especially the use of shoes that are too short or have a narrow toe box, are strongly linked to an increased hallux valgus angle in both children and adults. Ensuring proper shoe fit and considering barefoot activities where appropriate can help reduce the risk of developing hallux valgus. Shoe design should prioritize the natural shape and growth of the foot to promote long-term foot health.
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