Anthropometric, functional and foot trajectory determinants of stride length in self-reliant community-dwelling elderly persons in Talca, Chile

  • González P
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Abstract Objective: To analyze anthropometric, muscle performance and foot trajectory determinants of stride length (SL) during walking at a comfortable pace among self-reliant community-dwelling elderly persons in Talca, Chile. Method: A total of 63 self-reliant elderly persons participated in this observational and cross-sectional study. They were characterized by the anthropometric measures of mass, height and body mass index. Dorsiflexor muscle strength performance (DF-MS) and rate of force development were quantified. Finally, the elderly persons were asked to walk comfortably around a 40 meter elliptical circuit, using determined SL and maximum foot clearance (MaxFC) and minimum foot clearance (MFC) trajectory parameters. The SL determinants were evaluated by calculating the coefficient of determination (r2) considering a level of significance of p≤0.05. Results: The anthropometric variables demonstrated significant correlations (r>0.41) with the explanation of SL remaining incipient (r2<0.20). Muscle performance, meanwhile, was significantly correlated (r>0.52), with DF-MS standing out (r2=0.342). MaxFC represented a significant explanation for the data (r2=0.396), while the low correlation of MFC was not significant (r=0.24, r2=0.058). Conclusion: MaxFC and DF-MS are determinants of SL in self-reliant elderly Chileans. It is proposed that gait parameters could be normalized in accordance with trajectory and muscular performance.Resumen Objetivo: Analizar determinantes antropométricas, de rendimiento muscular y trayectoria del pie para la longitud de zancada (LZ) durante la ejecución de marcha confortable en adultos mayores autovalentes de la comunidad de Talca, Chile. Método: Participaron en esta investigación observacional y transversal 63 adultos mayores autovalentes, los cuales fueron caracterizados antropométricamente mediante masa, estatura y el índice de masa corporal. Se les cuantificaron el rendimiento de la fuerza muscular de dorsiflexores (FM-DF) y el ritmo de desarrollo de fuerza para dorsiflexores. Finalmente se les solicitó que caminaran confortablemente en un circuito elíptico de 40 metros, determinandose la LZ y las variables de trayectoria máximo despeje del pie (MaxDP) y mínimo despeje del pie (MDP). La evaluación de las determinantes de LZ se desarrolló mediante el cálculo del coeficiente de determinación (r2) considerando el nivel de significancia en p≤0,05. Resultados: Las variables antropométricas presentan correlaciones significativas (r>0,41), siendo incipiente la explicación sobre LZ (r2<0,20). Por su parte, el desempeño muscular se correlaciona significativamente (r>0,52), sobresaliendo la FM-DF (r2=0,342). El MaxDP presenta una importante explicación de datos (r2=0,396), por su parte la correlación del MDP fue baja no significativa (r=0,24; r2=0,058). Conclusion: Las determinantes de LZ en adultos mayores autovalentes chilenos son el MaxDP y la FM-DF. Se propone complementar la normalización de parámetros de marcha según la trayectoria y el desempeño muscular.




González, P. M. (2016). Anthropometric, functional and foot trajectory determinants of stride length in self-reliant community-dwelling elderly persons in Talca, Chile. Revista Brasileira de Geriatria e Gerontologia, 19(3), 495–505.

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