title: The effect of school trolley load on spatiotemporal gait parameters of children.
abstract: OBJECTIVE
  The present study evaluated spatiotemporal gait parameters in children when they were carrying school trolleys of different weights.
  
  
  METHODS
  We assessed four conditions: without trolley, 10%, 15% and 20% of the subject's body weight. Fourteen students from a primary school (aged 11.43±0.51 years) participated in this study. Velocity, cadence, stride length, stance phase, swing phase, single support phase and double support phase were analysed using an electronic walkway.
  
  
  RESULTS
  Compared with normal walking, the three load conditions produced significant decreases in swing phase (p<0.001) and single support phase (p<0.001) and significant increases in cadence (p=0.019), stance phase (p<0.001) and double support phase (p<0.001). No statistically-significant differences were found between the three load conditions.
  
  
  CONCLUSIONS
  Compared with normal walking, walking while carrying a trolley produced significant changes in most of the spatiotemporal gait parameters measured, perhaps due to the load-mediated changes in stability and balance. The spatiotemporal gait parameters were similar between the load conditions, indicating that the amount of load did not affect gait.
authors.affiliation: Department of Physical Education and Sports, University of Granada, Crta de Alfacar s/n, 18071 Granada, Spain. Electronic address: maevor@ugr.es.
authors.forename: E
authors.initials: E
authors.lastname: Orantes-Gonzalez
authors.affiliation: Department of Physical Education and Sports, University of Granada, Crta de Alfacar s/n, 18071 Granada, Spain.
authors.forename: J
authors.initials: J
authors.lastname: Heredia-Jimenez
authors.affiliation: Department of Physical Education and Sports, University of Granada, Crta de Alfacar s/n, 18071 Granada, Spain.
authors.forename: V M
authors.initials: VM
authors.lastname: Soto-Hermoso
mesh_terms: D000704:Analysis of Variance; D002648:Child; D005260:Female; D005684:Gait / Q000502:physiology*; D006801:Humans; D008297:Male; D016138:Walking / Q000502:physiology*; D016474:Weight-Bearing / Q000502:physiology*
keywords: Gait; Load; Students; Trolley