Janssens Lotte, Brumagne Simon, McConnell Alison K, Claeys Kurt, Pijnenburg Madelon, Goossens Nina, Burtin Chris, Janssens Wim, Decramer Marc, Troosters Thierry
KU Leuven Department of Rehabilitation Sciences, University of Leuven, Leuven, Belgium.
Centre for Sports Medicine and Human Performance, Brunel University, Uxbridge, United Kingdom.
PLoS One. 2014 Feb 12;9(2):e88247. doi: 10.1371/journal.pone.0088247. eCollection 2014.
Functional activities, such as the sit-to-stand-to-sit (STSTS) task, are often impaired in individuals with chronic obstructive pulmonary disease (COPD). The STSTS task places a high demand on the postural control system, which has been shown to be impaired in individuals with COPD. It remains unknown whether postural control deficits contribute to the decreased STSTS performance in individuals with COPD.
Center of pressure displacement was determined in 18 individuals with COPD and 18 age/gender-matched controls during five consecutive STSTS movements with vision occluded. The total duration, as well as the duration of each sit, sit-to-stand, stand and stand-to-sit phase was recorded.
Individuals with COPD needed significantly more time to perform five consecutive STSTS movements compared to healthy controls (19±6 vs. 13±4 seconds, respectively; p = 0.001). The COPD group exhibited a significantly longer stand phase (p = 0.028) and stand-to-sit phase (p = 0.001) compared to the control group. In contrast, the duration of the sit phase (p = 0.766) and sit-to-stand phase (p = 0.999) was not different between groups.
Compared to healthy individuals, individuals with COPD needed significantly more time to complete those phases of the STSTS task that require the greatest postural control. These findings support the proposition that suboptimal postural control is an important contributor to the decreased STSTS performance in individuals with COPD.
功能性活动，如坐立-站立-坐立（STSTS）任务，在慢性阻塞性肺疾病（COPD）患者中常常受损。STSTS任务对姿势控制系统有很高要求，而COPD患者的姿势控制系统已被证明存在受损情况。目前尚不清楚姿势控制缺陷是否导致COPD患者STSTS表现下降。
在18名COPD患者和18名年龄/性别匹配的对照组中，在连续五次STSTS动作且视力遮挡的情况下测定压力中心位移。记录总时长以及每个坐、坐立、站立和站立坐立阶段的时长。
与健康对照组相比，COPD患者完成连续五次STSTS动作需要显著更多时间（分别为19±6秒和13±4秒；p = 0.001）。与对照组相比，COPD组的站立阶段（p = 0.028）和站立坐立阶段（p = 0.001）显著更长。相比之下，两组之间的坐阶段时长（p = 0.766）和坐立阶段时长（p = 0.999）没有差异。
与健康个体相比，COPD患者完成STSTS任务中需要最大姿势控制的那些阶段需要显著更多时间。这些发现支持了姿势控制不佳是导致COPD患者STSTS表现下降的重要因素这一观点。
