The purpose of this study was to assess the establishment of dynamic marksmanship performance under different load and postural configurations. Participants quickly established two postures (forward and high targets) under head, trunk, and extremity loads during marksmanship performance. With the dynamic establishment of posture, load disrupted coordinative dynamics, resulting in reduced speed and accuracy on target. Specifically, torso loads increased segmental variability while establishing posture, and smaller head and upper extremity loads extended quieting time before firing. Increased head extension at the high target further destabilized posture, with reduced accuracy across all loads. Large torso loads reduced the adaptability to modulate postural fluctuations at the foot center of pressure while establishing postures for marksmanship, as evidenced by reductions in center of pressure variability. This study expands traditional static marksmanship research, providing insight into relations between task performance, coordinative variability, and postural control while dynamically establishing precision postures.

这项研究的目的是评估在不同的负载和姿势配置下动态枪法性能的建立。参加者在表演枪法时迅速在头部，躯干和四肢负荷下建立了两个姿势（向前和向高目标）。随着姿势的动态建立，载荷破坏了协调动力学，导致目标的速度和准确性降低。具体来说，躯干负荷在建立姿势的同时增加了节段的可变性，较小的头部和上肢负荷延长了射击前的安静时间。高目标位置时增加的头部伸展进一步使姿势不稳定，在所有负载下的准确性均下降。较大的躯干负荷降低了在建立射手姿势的同时调节压力的足部位置的姿势波动的适应性，压力变化中心的减少证明了这一点。这项研究扩展了传统的静态枪法研究，在动态建立精确姿势的同时，洞察了任务性能，协调变异性和姿势控制之间的关系。