Purpose. The aim of the study was to describe the gait kinematic behaviour of healthy Brazilian children aged 6-11 years old and examine the influence of age and gender on the analysed kinematic characteristics. Methods. A descriptive study that investigated the gait of 119 children (60 boys and 59 girls) aged 6-11 years was conducted. Data were stratified according to age (6-7 years, 8-9 years, 10-11 years) and gender and its impact over spatiotemporal gait parameters was assessed. An inexpensive yet satisfactorily valid and objective motion capture system was employed to compute gait parameters. Results. Non-normalised and normalised averages of stride length, step length, cadence and velocity from 119 participants were 1.23 ± 0.17 m and 1.8 ± 0.2, 0.63 ± 0.11 m and 0.9 ± 0.1 m, 117.9 ± 11.4 steps/min and 311.9 ± 23.9 steps/min, 72.5 ± 11.1 m/min and 27.9 ± 4.5 m/min, respectively. Stance and swing means (%GC) were 58.1% ± 3.3% and 41.9% ± 3.3%, respectively. Step and stride length increased with advancing age, while cadence decreased. A significant difference (p = 0.005) was found between Group 2 (8-9 years) and 3 (10-11 years) for normalised velocity. No significant differences between groups were found for other non-dimensional variables. Comparisons between boys and girls showed no differences (p > 0.05) in any spatiotemporal gait parameters. Conclusions. The gait kinematic behaviour of 119 Brazilian children was described using a low-cost instrumented gait analysis system. Gender was not a significant modifying factor for gait among the examined children. Our findings suggest a partially immature gait kinematic pattern in children aged between 6 to 11 years. Additional studies are needed to examine whether the differences between our results and those reported in the literature are due to issues of internal or external validity.
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机译：目的。这项研究的目的是描述6-11岁健康的巴西儿童的步态运动学行为，并研究年龄和性别对所分析运动学特征的影响。方法。进行了描述性研究，调查了119名6-11岁儿童（60名男孩和59名女孩）的步态。根据年龄（6-7岁，8-9岁，10-11岁）和性别对数据进行分层，并评估其对时空步态参数的影响。使用廉价但令人满意的有效和客观的运动捕获系统来计算步态参数。结果。 119名参与者的步幅，步长，步频和速度的非归一化和归一化平均值为1.23±0.17 m和1.8±0.2、0.63±0.11 m和0.9±0.1 m，117.9±11.4步/分钟和311.9±23.9步/min、72.5±11.1 m / min和27.9±4.5 m / min。站姿和摆动平均值（％GC）分别为58.1％±3.3％和41.9％±3.3％。步幅和步幅随着年龄的增长而增加，而踏频则降低。在第2组（8-9岁）和第3组（10-11岁）之间发现归一化速度存在显着差异（p = 0.005）。对于其他无量纲变量，各组之间没有发现显着差异。男孩和女孩之间的比较显示，在任何时空步态参数上均无差异（p> 0.05）。结论。使用低成本的仪器化步态分析系统描述了119名巴西儿童的步态运动行为。在被检查的儿童中，性别并不是步态的重要改变因素。我们的发现表明6至11岁儿童的步态运动学模式部分不成熟。需要进行其他研究，以检查我们的结果与文献报道的结果之间的差异是否是由于内部或外部有效性问题引起的。
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