Estimating the action capability is vital for humans to move their bodies successfully. Researchers have proposed reachability as an overestimation of motor abilities by judging unreachable distances as reachable. The existing literature has mainly investigated the sagittal direction, but multi-directional reachability is unexplored. This study examined the relationship between perception and motor using the reaching of the lower limbs in multiple directions. We asked 16 adults to reach targets projected onto the floor at 21 locations (seven directions and three distances) to estimate the reaching time. We found that the reaching time slowed as the direction increased toward the contralateral side, but the subjective reaching time did not change with direction. Multiple regression analysis showed that the subjective reaching time could be calculated accurately, mainly using the duration from the toe leaving the ground to movement completion. These results suggest that changes in direction may not be perceived precisely by the motor system of the lower limbs and that the subjective reaching time was strongly affected by the time after the toe left the ground. Our findings provide novel insights into the relationship between motor and perception in multiple directions, which may provide a new strategy for the maximal performance of lower-limb movement.

估计动作能力对于人类成功移动身体至关重要。研究人员提出，可达性是对运动能力的高估，将无法达到的距离判断为可达。现有文献主要研究矢状方向，但多方向可达性尚未探索。这项研究利用下肢在多个方向上的伸展来检查感知和运动之间的关系。我们要求 16 名成年人到达投影在地板上 21 个位置（七个方向和三个距离）的目标，以估计到达时间。我们发现，随着方向向对侧增加，到达时间减慢，但主观到达时间不随方向变化。多元回归分析表明，主观到达时间可以准确计算，主要利用脚趾离开地面到动作完成的持续时间。这些结果表明，下肢运动系统可能无法准确感知方向的变化，并且主观到达时间受到脚趾离开地面后时间的强烈影响。我们的研究结果为多方向运动和感知之间的关系提供了新颖的见解，这可能为下肢运动的最大表现提供新策略。