Abstract

The purpose of this study was to determine how dual-task (DT) effect on gait differs among adolescents with different fitness and health profiles. The gait performances of 365 adolescents aged 13–14 years were assessed at single and DT walking. The proportional changes in gait parameters from single to dual were regressed against gender, body mass index (BMIz), three components of MABC-2 (balance, aiming &catching and manual dexterity), group (high vs low motor competence), body strength, physical fitness level using multiple regression analyses; and gender and four items of balance subtest of MABC-2 in the secondary analysis. The analyses showed that being female was associated with greater reduction in gait speed and stride length and an increase in double support time and step time; and having lower score in balance was related to greater reduction in gait speed, and cadence, and an increase in step time. Only zig-zag hopping item of the balance subtest was associated with DT effect on gait speed and stride length. No significant relationships were found between DT effect on gait and the rest of the predictors. Females and adolescents with lower level of balance function may be at higher risk of having DT deficit during walking.

摘要

本研究的目的是确定双重任务 (DT) 对步态的影响在具有不同健身和健康状况的青少年中有何不同。365 名 13-14 岁青少年的步态表现在单人和 DT 步行时进行了评估。步态参数从单到双的比例变化与性别、体重指数 (BMIz)、MABC-2 的三个组成部分（平衡、瞄准和捕捉和手动灵活性）、组（高与低运动能力）、身体力量、使用多元回归分析的体能水平；二级分析中MABC-2的性别和四项平衡分测验。分析表明，女性与步速和步幅的更大降低以及双支撑时间和步数时间的增加有关；平衡得分较低与步态速度、节奏和步频时间的增加有关。只有平衡子测试的之字形跳跃项目与 DT 对步速和步幅的影响有关。未发现 DT 对步态的影响与其他预测因子之间存在显着关系。平衡功能水平较低的女性和青少年在行走过程中出现 DT 缺陷的风险可能更高。