雙重作業與與增加跨步阻力對年輕人及與老年人在軟墊上跨步參數的影響

The Effect of Dual Task and Adding Resistance on Stepping Parameters on a Complaint Mat for the Young and Old Adults

卓瓊鈺(Chiung-Yu Cho) ； 吳怡琳(Yi-Lin Wu) ； 徐永玟(Yun-Wen Hsu)

《物理治療》 33卷6期 (2008/12) Pp. 365-371

摘要

Background and Purpose: Dual task paradigm is a challenging situation for balance maintenance. Previous studies have shown that dual task might increase gait variability. However, the effect on stepping ability is not clear. The purpose of this study was trying to investigate whether dual task and adding resistance would affect stepping ability in different direction. Moreover, the effects of age and floor on stepping ability were also investigated. Methods: Eleven normal young and 11 old adults were recruited from Tainan area. All of them were free of neurological diseases. For the older adults, their MMSE scores should be greater than 24 and walking speed greater than 0.8 m/s. For each subject, there were two task situations (single and dual task), two test conditions (with weight and without weight on their dominant leg), two test ground (floor and foam), and three stepping directions (anterior, lateral and posterior) they had to encounter. One digital camera and one foot switch were uses for data collection. Repeated measure ANOVA was use for statistical analysis. Results: Our results indicated that the older adults had longer step length than the young adults. All subjects increased their step length, swing time anti stance time for the dual task trials (p＜0.05). However, they decreased their step length variability for the dual task trials. There was a significant difference of step length variability among three stepping directions. Older subjects decreased their swing time variability while they carried weight on their dominant legs (p＜0.05). Conclusions: Using dual task paradigm might be a challenging condition for a stepping task. However, adding weight as a proprioceptive stimulation to the dominant leg might decrease the variability of most gait parameters.

關鍵字

跨步 ； 年齡 ； 雙重作業 ； 阻力 ； 變異度

並列摘要

Background and Purpose: Dual task paradigm is a challenging situation for balance maintenance. Previous studies have shown that dual task might increase gait variability. However, the effect on stepping ability is not clear. The purpose of this study was trying to investigate whether dual task and adding resistance would affect stepping ability in different direction. Moreover, the effects of age and floor on stepping ability were also investigated. Methods: Eleven normal young and 11 old adults were recruited from Tainan area. All of them were free of neurological diseases. For the older adults, their MMSE scores should be greater than 24 and walking speed greater than 0.8 m/s. For each subject, there were two task situations (single and dual task), two test conditions (with weight and without weight on their dominant leg), two test ground (floor and foam), and three stepping directions (anterior, lateral and posterior) they had to encounter. One digital camera and one foot switch were uses for data collection. Repeated measure ANOVA was use for statistical analysis. Results: Our results indicated that the older adults had longer step length than the young adults. All subjects increased their step length, swing time anti stance time for the dual task trials (p＜0.05). However, they decreased their step length variability for the dual task trials. There was a significant difference of step length variability among three stepping directions. Older subjects decreased their swing time variability while they carried weight on their dominant legs (p＜0.05). Conclusions: Using dual task paradigm might be a challenging condition for a stepping task. However, adding weight as a proprioceptive stimulation to the dominant leg might decrease the variability of most gait parameters.

並列關鍵字

Stepping ； Age ； Dual task ； Resistance ； Variability