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Aim: To evaluate the linear variability of comfortable gait according to socioeconomic status in community-dwelling elderly.

Method: For this cross-sectional observational study 63 self- functioning elderly were categorized according to the socioeconomic level on medium-low (n= 33, age 69.0 ± 5.0 years) and medium-high (n= 30, age 71.0 ± 6.0 years). Each participant was asked to perform comfortable gait speed for 3 min on an 40 meters elliptical circuit, recording in video five strides which were transformed into frames, determining the minimum foot clearance, maximum foot clearance and stride length. The intra-group linear variability was calculated by the coefficient of variation in percent.

Results: The trajectory parameters variability is not different according to socioeconomic status with a 30% (range= 15-55%) for the minimum foot clearance and 6% (range= 3-8%) in maximum foot clearance. Meanwhile, the stride length consistently was more variable in the medium-low socioeconomic status for the overall sample (p= 0.004), female (p= 0.041) and male gender (p= 0.007), with values near 4% (range = 2.5-5.0%) in the medium-low and 2% (range = 1.5-3.5%) in the medium-high.

Conclusions: The intra-group linear variability is consistently higher and within reference parameters for stride length during comfortable gait for elderly belonging to medium-low socioeconomic status. This might be indicative of greater complexity and consequent motor adaptability.

Paul Alejandro Medina González, Universidad Católica del Maule

Kinesiólogo, Licenciado en Kinesiología y Magíster en Kinesiología de la Universidad Católica del Maule. Actualmente me desempeño en la Línea de Razonamiento Profesional y como integrante del Laboratorio de Envejecimiento y Funcionalidad del Departamento de Kinesiología de la Universidad Católica del Maule. Mis áreas de interés son la Kinesiología, el Movimiento Ecológico y la Antropología Biológica, para responder a la interrogante acerca de la “Caracterización de la función-disfunción del movimiento humano según aspectos evolutivos, ecológicos y sociales, en específico la marcha para diferentes etapas del ciclo vital”.

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Received 2015-12-19
Accepted 2016-06-16
Published 2016-06-21