Publication:

國際標準舞介入休閒活動對平衡控制的影響

本研究的主要目的係通過雙項任務設計探討國際標準舞舞者平衡控制能力在聽覺干擾情境之影響。研究以從事國際標準舞、參與一般運動與無運動習慣等三組大專學生各20名為實驗參加者，進行單純的靜態單足張眼站立及快、慢音樂節拍計算干擾下的靜態單足站立等三種情境之平衡控制能力測試。實驗以Catsys 2000系統記錄與分析靜態單足站立時的壓力中心平均擺動距離、橫軸擺動距離、矢狀軸擺動距離、擺動面積、擺動速度和擺動強度等平衡控制參數。並以3（站立情境）× 3（運動型態）混合設計二因子變異數分析與最小顯著性差異考驗進行統計檢定，顯著水準設定為α＝.05。結果顯示三組實驗參加者在二種音樂節拍計算干擾情境的靜態單足站立平均擺動距離均小於單純的靜態單足站立（p<.05）；國際標準舞舞者除了在單純的靜態站立情境下之矢狀軸擺動距離與參與一般運動組和無運動習慣組無顯著差異外（p>.05），國際標準舞舞者單純的靜態站立情境下之其它平衡控制參數及快、慢音樂節拍計算干擾下平衡控制能力皆顯著優於參與一般運動組和無運動習慣組（p<.05）。本研究說明了單足站立平衡不會由於音樂干擾情境的雙項任務設計而產生表現的退化，且以國際標準舞作為休閒活動確實存在平衡控制能力提昇的實質效益。

The purpose of this study was based on dual task design paradigm to investigate the effects of stance postural control for ballroom dancers under the conditions of auditory interference. Twenty college students by each group who were active in ballroom dance, active in the other exercises, and sedentary students respectively volunteered to participate in this study and were asked by randomization to stand quietly in one foot with eyes open (quiet stance), quiet stance with the interference of the bar counting of slow music simultaneously (quiet stance with slow music), and quiet stance with the interference of the bar counting of quick music simultaneously (quiet stance with quick music). The Catsys 2000 system was used to record and to analyze center of pressure displacement in the parameters of mean sway, transversal axis, sagittal axis, sway area, sway velocity and sway intensity during three periods of balance control. 3 (standing condition) × 3 (recreational activity) mixed design two way ANOVA and the least significant difference post hoc test with an alpha level of .05 were adopted to analyze the statistical differences. The results showed that among the three groups of participants, the mean sway during both the conditions of quiet stance with slow and quick rhythmic countings were significantly less than the simple condition of quiet stance (p<.05). Regarding the performance of balance control, the group of ballroom dance was significantly better than the group of active in the other exercises and the group of sedentary under three standing conditions (p<.05) besides displacement of sagittal axis during simple task of quiet stance (p>.05). The findings indicated that the performance of one foot balance control did not regress when it was combined with the secondary task that demanded attention under the interference of the bar counting of music. This study supported that ballroom dance as a recreational activity indeed enhanced the performance of stance postural control.