Department of Physical Education and Sports, Faculty of Education, Middle East Technical University, Ankara, Turkey.
Department of Biomechanics and Motor Control, Faculty of Sport Sciences, Hacettepe University, Ankara, Turkey.
Gait Posture. 2022 Jul;96:1-8. doi: 10.1016/j.gaitpost.2022.05.001. Epub 2022 May 4.
Previous dual task studies suggested that the difficulty of the concurrent cognitive and motor tasks may not be challenging to the same degree for each person. This study approaches this problem by setting individualized difficulty levels for tasks to examine the dual task interference.
Do the features of postural sway depend on increased individualized difficulty levels of concurrent cognitive and postural activities?
20 young healthy participants (10 male, 10 female) took part in the study. Before the experiments, cognitive task difficulty (No-, Medium-, High) has been set individually. Subjects performed postural tasks (quiet stance, voluntary sway) concurrently with or without a cognitive task which based on simple arithmetic calculations. Postural sway features were examined.
Postural sway features were affected by individualized difficulty level of concurrent cognitive and postural activities. In voluntary sway, as a more challenging postural task, higher reductions were observed for such sway features as COP velocity and range in AP direction.
This study signaled task-specific changes in postural sway features. When the difficulty levels were set individually, the effect of motor and cognitive dual task was more apparent when the balance requirement of the primary motor task increased.
先前的双重任务研究表明,对于每个人来说,同时进行认知和运动任务的难度可能并不具有相同的挑战性。本研究通过为任务设置个性化的难度级别来解决这个问题,以检查双重任务干扰。
姿势摆动的特征是否取决于认知和姿势活动的增加的个性化难度水平?
20 名年轻健康的参与者(10 名男性,10 名女性)参加了这项研究。在实验之前,根据简单的算术计算,为认知任务的难度(无、中、高)设置了个性化的难度级别。同时进行了姿势任务(安静站立、自主摆动)和认知任务。检查了姿势摆动特征。
姿势摆动特征受到同时进行的认知和姿势活动的个性化难度水平的影响。在自主摆动中,作为更具挑战性的姿势任务,在 COP 速度和 AP 方向的摆动范围等摆动特征方面观察到更高的降低。
这项研究表明,姿势摆动特征具有任务特异性。当难度级别被个性化设置时,当主要运动任务的平衡要求增加时,运动和认知双重任务的影响更加明显。