[Relación entre el estado ponderal y la postura del pie en escolares españoles: estudio transversal].

Objective: Childhood flatfoot and overweight can affect children's quality of life and influence their development, increasing the risk of musculoskeletal problems in adulthood. There is evidence linking overweight to the development of childhood flatfoot. The aim of the study was to assess the relationship between the weight status of school children and their foot posture and to determine whether there are differences between both sexes.

Methods: A cross-sectional study (2021) in a sample of schoolchildren (n=296, 153 boys and 143 girls, mean age 8.5±2.7) from Colegio San Agustín in Zaragoza was carried out. Foot posture was assessed according to the foot postural index, and weight status was obtained using the body mass index according to the criteria of the International Obesity Task Force. The correlation between weight status and foot posture was analyzed using Spearman's coefficient. The Chi-square test was used to determine the differences between the variables according to sex.

Results: Weight status showed no correlation with foot posture in boys (right foot p=0.095; left foot p=0.067) and girls (right foot p=-0.04; left foot p=0.008). Boys had a higher prevalence of flat feet than girls (boys foot posture index=8; girls foot posture index=7; right foot p<0.036; left foot p<0.009). Boys had higher prevalence of overweight than girls (28.75; 18.18, p<0.027).

Conclusions: Weight status has no effect on foot posture. The male gender could predispose to the development of flat feet and overweight in childhood.