Asymmetric Influence of Dual-Task Interference on Anticipatory Postural Adjustments in One-Leg Stance

Young Hoon Song, Si Ni Cho and Soo Mi Nam ()
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Young Hoon Song: Department of Physical Education, Seoul National University, Seoul 08826, Korea
Si Ni Cho: Department of Physical Education, Seoul National University, Seoul 08826, Korea
Soo Mi Nam: Department of Physical Education, Seoul National University, Seoul 08826, Korea

IJERPH, 2022, vol. 19, issue 18, 1-11

Abstract: This study investigated the differences of anticipatory postural adjustments (APAs) in a one-leg stance (OLS) that appear according to lower-extremity dominance and dual-task interference. Thirteen young, healthy, male volunteers performed the OLS task under the following six conditions: (1) dominant leg (DL), single-task; (2) DL, dual-task, with a low level of cognitive load (DT1/2); (3) DL, dual-task, with a high level of cognitive load (DT + 1); (4) non-dominant leg (NDL), single-task; (5) NDL, DT1/2; and (6) NDL, DT + 1. In order to measure the subjects’ APA, we used the medial–lateral displacement of their centers of pressure and gravity from the force plate and the time-series data of joint angular motions, recorded using a 3D motion analysis system. In the NDL under the dual-task condition, the onset of APA was delayed and the amplitude declined, which resulted in an increase in the duration of the APA period. The number of components identified by principal component analysis differed according to the dominant foot, and the change caused by cognitive load was found only in the NDL. As the cognitive load increased, the variance of the principal component decreased. These findings show that dual-task interference asymmetrically influences APA according to limb dominance, which reorganizes the coordination strategy of joints’ angular motion.

Keywords: anticipatory postural adjustments; dual-task interference; one-leg stance; PCA (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2022
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