Human Health Sciences, Graduate School of Medicine, Kyoto University, Kyoto, Japan.
Telemed J E Health. 2011 Dec;17(10):768-72. doi: 10.1089/tmj.2011.0054. Epub 2011 Oct 19.
The purpose of this randomized control trial study was to evaluate the effectiveness of a digital video disc (DVD)-based seated dual-task (DT) stepping exercise to improve the DT walking capability in elderly people. In the DT exercise, participants were asked to perform a verbal fluency task while stepping as quickly as possible.
Eight clusters (n=93) randomized into a DVD group (4 clusters, n=48) and a nonexercise control group (4 clusters, n=45) participated in this trial. In the DVD group, participants received 20 min of group training twice a week for 24 weeks. The exercise class used an exercise DVD that included a 15-min basic exercise and a 5-min DT exercise. No exercise program was prescribed for the control group. The measurements were based on the difference in physical function, including DT walking, between the DVD and control groups. In the DT walking test, participants walked individually at a comfortable speed while carrying a ball on a tray. The relative DT lag was calculated by using simple walking as the comparison condition. The Timed Up and Go test and the 5-chair stand test were also performed.
The median relative adherence to the study was 87.5% (25th-75th percentile, 83.3%-95.8%) in the DVD group. The outcome measurements, including the DT walking time and DT time lag (p<0.05), among participants in the DVD group were significantly improved. However, other outcome measurements were not significantly different between the two groups (p>0.05).
The current study reports the effectiveness of a DVD-based exercise for the improvement of the DT walking capability. A larger study is needed to confirm the present results. Study of a Web-based exercise regime would be valuable to identify the most effective exercise for prevention of falls and fall-related fractures.
本随机对照试验研究的目的是评估基于数字视频光盘（DVD）的坐姿双重任务（DT）踏步运动对改善老年人 DT 步行能力的有效性。在 DT 运动中，参与者被要求在尽可能快地踏步的同时进行口头流畅性任务。
8 个群组（n=93）随机分为 DVD 组（4 个群组，n=48）和非运动对照组（4 个群组，n=45）参与了这项试验。在 DVD 组中，参与者每周接受 2 次，每次 20 分钟的小组训练，共 24 周。运动课程使用了包含 15 分钟基础运动和 5 分钟 DT 运动的练习 DVD。对照组没有规定运动方案。测量结果基于 DVD 组和对照组之间的身体功能差异，包括 DT 步行。在 DT 步行测试中，参与者在舒适的速度下独自携带托盘上的球行走。相对 DT 滞后通过将简单行走作为比较条件来计算。还进行了计时起立行走测试和 5 椅站立测试。
DVD 组的中位数相对依从率为 87.5%（25%至 75%分位数，83.3%至 95.8%）。DVD 组参与者的 DT 步行时间和 DT 时间滞后的结果测量值（p<0.05）显著改善。然而，两组之间的其他结果测量值没有显著差异（p>0.05）。
本研究报告了基于 DVD 的运动对改善 DT 步行能力的有效性。需要更大的研究来确认目前的结果。研究基于网络的运动方案将有助于确定预防跌倒和与跌倒相关的骨折最有效的运动。
