Department of Biomedical Sciences, University of Copenhagen, Copenhagen N, Denmark.
Department of Physical Performance, Norwegian School of Sport Sciences, Oslo, Norway.
J Mot Behav. 2021;53(1):20-29. doi: 10.1080/00222895.2020.1723478. Epub 2020 Feb 11.
Thirteen shooters and eleven non-shooters completed two-legged and single-legged stance on a force platform. The dynamics of the center of pressure trajectory was assessed using sample entropy, correlation dimension and entropic half-life. Additionally, the body sway was quantified as the elliptical area of the trajectory. The shooters had lower sample entropy and tended to have longer entropic half-life during the single-legged stance. Across the two tasks, the correlation dimension in the anterior-posterior direction and the body sway in both directions were lower in the shooters. This suggests that extensive training in quiet stance is associated with altered postural control, especially during challenging single-legged stance and to a lesser extend during two-legged stance.
13 名射手和 11 名非射手在力量平台上完成了双腿和单腿站立。使用样本熵、关联维数和熵半衰期评估了压力中心轨迹的动力学。此外，身体摆动被量化为轨迹的椭圆区域。在单腿站立时，射手的样本熵较低，熵半衰期较长。在两项任务中，前-后方向的关联维数和两个方向的身体摆动在射手组中均较低。这表明，在安静站立时进行广泛的训练与姿势控制的改变有关，尤其是在具有挑战性的单腿站立时，在双腿站立时的影响较小。
