Department of Industrial Engineering and Engineering Management, National Tsing Hua University, Hsinchu 30013, Taiwan.
Department of Physical Therapy, University of Nevada, Las Vegas, Las Vegas, NV 89154, USA.
Sensors (Basel). 2021 May 10;21(9):3280. doi: 10.3390/s21093280.
The purpose of this study was to employ inertial measurement units (IMU) with an eye-tracking device to investigate different swing strategies between two levels of batters. The participants were 20 healthy males aged 20 to 30 years old, with ten professional and ten amateur batters. Eye gaze position, head, shoulder, trunk, and pelvis angular velocity, and ground reaction forces were recorded. The results showed that professional batters rotated segments more rhythmically and efficiently than the amateur group. Firstly, the professional group spent less time in the preparation stages. Secondly, the maximum angular velocity timing of each segment of the professional group was centralized in the swing cycle. Thirdly, the amateur group had significantly earlier gaze timing of the maximum angular velocity than the professional group. Moreover, the maximum angular velocity timing of the gaze was the earliest parameter among the five segments, and significantly earlier (at least 16.32% of cycle time) than the maximum angular velocity of the head, shoulder, trunk, and pelvis within the amateur group. The visual-motor coordination strategies were different between the two groups, which could successfully be determined by wearable instruments of IMU.
本研究旨在利用惯性测量单元（IMU）和眼动追踪设备，研究两种击球手之间不同的挥拍策略。参与者为 20 名年龄在 20 至 30 岁之间的健康男性，其中 10 名是专业击球手，10 名是业余击球手。记录了眼注视位置、头部、肩部、躯干和骨盆角速度以及地面反作用力。结果表明，专业击球手的挥拍动作比业余组更有节奏、更高效。首先，专业组在准备阶段花费的时间更少。其次，专业组每个部位的最大角速度的时间集中在挥拍周期内。第三，业余组的最大角速度注视时间明显早于专业组。此外，在业余组中，注视的最大角速度时间是五个部位中最早的参数，比头部、肩部、躯干和骨盆的最大角速度早至少 16.32%的周期时间。两组之间的视觉-运动协调策略不同，这可以通过可穿戴的 IMU 仪器成功确定。
