Análise das impressões plantares de bailarinas através de parâmetros plantigráficos / Analysis of plantar prints of ballet dancers through plantigraphy parameters

Introduction: The classical ballet is a dance that most of the times uses extreme positions such as extern rotation of the hips and plantar flexion of ankles and feet. These last ones may suffer morpho structural alterations. Objective: The objective of this study was to analyze the plantar prints of classical dancers through plantigraphy parameters. Methods: It is an observational descriptive study carried out with a sample of 66 classical dancers of Teresina/PI, 17.0 ± 3.1 years old and with at least 2 years of practice. The evaluation instrument used was a PODO tech brand plantigraph and the classification followed Viladot criteria. Data were analyzed using descriptive statistics and the Pearson linear correlation test. Results: We observed the prevalence of cavus deformity (62.1%) followed by normal feet (36.4%) and flatfoot (1.5%). There was no correlation between the type of feet and the period of practice. However, it has been found a weak and moderate correlation between feet type and the points of overpressure and pain, respectively. Conclusion: The practice of classical ballet contributes to the formation of cavus deformity, requiring intervention against possible damage that may be associated to this fact. (AU)

Introdução: O ballet clássico é uma dança que na maioria das vezes utiliza posições extremas como rotação externa dos quadris e flexão plantar de tornozelos e pés. Podendo, estes últimos, sofrerem alterações morfo-estruturais. Objetivo: O objetivo do estudo foi analisar as impressões plantares de bailarinas clássicas através de parâmetros plantigráficos. Material e métodos: Trata-se de um estudo descritivo observacional que foi realizado numa amostra de 66 bailarinas clássicas da cidade de Teresina/PI, com média de idade de 17,0 ± 3,1 anos e no mínimo 2 anos de prática. O instrumento avaliativo utilizado foi um plantígrafo da marca PODO tech e a classificação seguiu os critérios definidos por Viladot. Os dados foram analisados por estatística descritiva e pelo teste de correlação linear de Pearson. Resultados: Verificou-se prevalência de pés cavos (62,1%), seguido por pés normais (36,4%) e pé plano (1,5%). Não houve correlação entre o tipo de pé e o tempo de prática. Contudo, encontrou-se correlação fraca e moderada entre o tipo de pé e os pontos de hiperpressões e as dores, respectivamente. Conclusão: A prática do ballet clássico contribui para a formação de um pé cavo, sendo necessária intervenção frente a possíveis danos que possam estar associados a este fato. (AU)

The Analysis of Relationship among the Anthropometric Index, the Foot Types and Dynamic Plantar Pressure in Normal Teenagers

OBJECTIVE: To investigate the possible relationship between the anthropometric data, the foot types, sex and the dynamic plantar pressure of normally developed teenagers. METHOD: The height, weight, body mass index and dynamic plantar pressure were measured from 98 teenagers. Foot types were classified to high arch, normal and flat foot groups depending on the value derived by dividing the minimal length of mid foot area by the maximal length of the rear foot area. RESULTS: The area with the highest plantar pressure was the middle metatarsal area at both feet. However the plantar pressure of the right medial metatarsal and lateral calcaneal areas was greater than the left, while the plantar pressure of the left lateral metatarsal and medial calcaneal areas was greater than the right. Therefore, supinating and pronating forces were applied to the right and left feet. There were statistically significant differences in body weight and BMI among three groups. The comparison between men and women in plantar pressure measurements and foot type determinations showed that the number of pronated feet group and plantar pressures was greater in males than in females. CONCLUSION: The dynamic plantar pressure of teenagers showed high correlation to weight and BMI. Just like the hands, there was lateral dominance at the feet, and analysis of dynamic plantar pressure of each foot showed asymmetry and asymmetrical turning forces.