Center of Excellence for Sport Science and Coach Education, East Tennessee State University, Campus Box 70654, Johnson City, TN 37614, USA.
Sports Biomech. 2012 Nov;11(4):524-31. doi: 10.1080/14763141.2012.724703.
The purposes of the study were to track weightlifters' barbell acceleration with a portable accelerometer over three training sessions to examine test-retest reliability and to compare peak barbell acceleration at different training intensities. Twelve nationally ranked weightlifters volunteered for this study. The portable accelerometer was attached to the right side of the barbell to measure barbell resultant acceleration during the snatch lift at a sampling frequency of 100 Hz. The data were collected over three training sessions at intensity levels of 80%, 85%, and 90% of one repetition maximum. The data were analyzed using intra-class correlation coefficients (ICCs) for the three training sessions and one-way repeated measure ANOVA to compare the difference in peak barbell acceleration at three intensities. Results showed that the device was highly reliable with an ICC of 0.88 and 95% confidence interval of 0.81-0.93. There were significant differences in peak barbell acceleration at various lifting intensities, indicating a decline of the acceleration as the mass of the barbell became heavier. The portable accelerometer seems useful in measuring barbell acceleration data, which can be analyzed in future studies to monitor a weightlifter's performance in a practical setting instead of testing at a laboratory.
本研究的目的是通过便携式加速度计在三次训练中跟踪举重运动员的杠铃加速度，以检验测试-重测信度，并比较不同训练强度下的杠铃峰值加速度。十二名国家级举重运动员自愿参加了这项研究。便携式加速度计附在杠铃的右侧，以 100Hz 的采样频率测量抓举过程中的杠铃合成加速度。数据是在三个训练阶段收集的，强度水平分别为 1 次最大重复次数的 80%、85%和 90%。使用三个训练阶段的组内相关系数（ICC）和单向重复测量 ANOVA 分析数据，以比较三个强度下的杠铃峰值加速度差异。结果表明，该设备具有高度可靠性，ICC 为 0.88，95%置信区间为 0.81-0.93。在不同的举重强度下，杠铃峰值加速度存在显著差异，表明随着杠铃质量的增加，加速度会下降。便携式加速度计似乎可用于测量杠铃加速度数据，未来的研究可以分析这些数据，以便在实际环境中监测举重运动员的表现，而不是在实验室中进行测试。
