Association of dual-task walking performance and leg muscle quality in healthy children
Association of dual-task walking performance and leg muscle quality in healthy children
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DOI：
10.1186/s12887-015-0317-8
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发表时间：
2015-02-05
期刊：
影响因子：
2.4
通讯作者：
Granacher, Urs
中科院分区：
文献类型：
--
作者：
Beurskens, Rainer;Muehlbauer, Thomas;Granacher, Urs
背景：以往的文献主要介绍了认知功能来解释双任务行走中的性能下降，即，双任务运动的变化归因于有限的认知信息处理能力。在这项研究中，我们扩大现有的文献和调查是否腿部肌肉的能力发挥了额外的作用，在儿童的双任务步行performance.Methods：为此，我们有青春期前的儿童（平均年龄：8.7 +/- 0.5岁，年龄范围：7-9岁）走在单任务（ST），同时进行算术减法任务（DT）。此外，腿部瘦组织质量进行了评估。结果：研究结果表明，男孩和女孩，显着降低他们的步态速度（f = 0.73），步幅（f = 0.62）和节奏（f = 0.68）并增加其变异性（f = 0.20-0.63）。此外，逐步回归表明，腿部瘦肉组织质量与步行时间及其在DT期间的可变性密切相关（R-2 = 0.44，p = 0.009）。ST（R-2 = 0.17，p = 0.19）无法观察到步态测量和腿部瘦组织质量之间的这些关联。结论：我们能够显示儿童腿部肌肉能力和DT行走性能之间的潜在联系。我们将这些发现解释为儿童腿部肌肉质量较高可能通过诱导增强步态稳定性来减轻认知干扰任务对DT行走性能的影响的证据。
Background: Previous literature mainly introduced cognitive functions to explain performance decrements in dual-task walking, i.e., changes in dual-task locomotion are attributed to limited cognitive information processing capacities. In this study, we enlarge existing literature and investigate whether leg muscular capacity plays an additional role in children's dual-task walking performance.Methods: To this end, we had prepubescent children (mean age: 8.7 +/- 0.5 years, age range: 7-9 years) walk in single task (ST) and while concurrently conducting an arithmetic subtraction task (DT). Additionally, leg lean tissue mass was assessed.Results: Findings show that both, boys and girls, significantly decrease their gait velocity (f = 0.73), stride length (f = 0.62) and cadence (f = 0.68) and increase the variability thereof (f = 0.20-0.63) during DT compared to ST. Furthermore, stepwise regressions indicate that leg lean tissue mass is closely associated with step time and the variability thereof during DT (R-2 = 0.44, p = 0.009). These associations between gait measures and leg lean tissue mass could not be observed for ST (R-2 = 0.17, p = 0.19).Conclusion: We were able to show a potential link between leg muscular capacities and DT walking performance in children. We interpret these findings as evidence that higher leg muscle mass in children may mitigate the impact of a cognitive interference task on DT walking performance by inducing enhanced gait stability.