Sato Kimitake, Smith Sarah L, Sands William A
Department of Sport and Exercise Science, University of Northern Colorado, Greeley, Colorado, USA.
J Strength Cond Res. 2009 Jan;23(1):341-7. doi: 10.1519/JSC.0b013e3181876a01.
Weightlifting technique is a well-studied subject with regard to standard biomechanical analysis that includes barbell velocity as well as barbell trajectory, but kinematic data such as barbell acceleration have not often been reported. Real-time or near-real-time feedback can be more helpful to coaches and athletes than delayed feedback. The purpose of this study was to validate measures obtained by a commercially available accelerometer in comparison with kinematic data derived from video. The hypothesis was that there would be a high positive relationship between accelerometer data and acceleration measures derived from video records of a barbell high-pull movement. Accelerometer values and kinematic data from high-speed video were obtained from 7 volunteers performing 2 trials each of a barbell high-pull. The results showed that the accelerometer measures were highly correlated with derived acceleration data from video (r = 0.94-0.99). On the basis of these results, the device was considered to be validated; thus, the unit may be a useful tool to measure acceleration during real-time training sessions rather than only reserved for collecting data in a laboratory setting. This device can be a valuable tool to provide instant feedback to coaches and athletes to assess individual barbell acceleration performance.
就包括杠铃速度和杠铃轨迹的标准生物力学分析而言，举重技术是一个经过充分研究的课题，但诸如杠铃加速度等运动学数据却鲜有报道。与延迟反馈相比，实时或近实时反馈对教练和运动员可能更有帮助。本研究的目的是验证市售加速度计所获得的测量结果，并与从视频中获取的运动学数据进行比较。研究假设是，加速度计数据与从杠铃高拉动作的视频记录中得出的加速度测量值之间存在高度正相关关系。从7名志愿者进行的两次杠铃高拉试验中获取了加速度计数值和高速视频的运动学数据。结果表明，加速度计测量值与视频得出的加速度数据高度相关（r = 0.94 - 0.99）。基于这些结果，该设备被认为得到了验证；因此，该装置可能是实时训练期间测量加速度的有用工具，而不仅仅局限于在实验室环境中收集数据。该设备可以成为向教练和运动员提供即时反馈以评估个人杠铃加速度表现的宝贵工具。
