Torres-Moreno R, Tanaka C, Penney K L
School of Physical and Occupational Therapy, Faculty of Medicine, McGill University, Montreal, Quebec, Canada.
Int J Sports Med. 2000 Jan;21(1):41-4. doi: 10.1055/s-2000-8850.
Rowers may sacrifice on-water technique during ergonometric training in an attempt to increase stroke output. This cross-sectional study aimed to identify characteristics of ergonometric rowing technique that could be potentially detrimental to an effective and safe on-water performance. Joint excursion, handle velocity, and applied force were measured in 44 athletes while they performed a 2500 meter race on an instrumented ergometer. Results on four subjects are presented here. Their performance is compared to that of a Barcelona Olympic and World champion rower with 12 years of experience to illustrate how athletes deviate from standard on-water technique. Kinematic data showed knee joint oscillations and out-of-phase hip and knee joint reversals. Horizontal handle velocity curves indicated that higher stroke rates were achieved by a decrease in recovery time. Vertical handle velocity curves exhibited bi-directional variations. The largest amplitude occurred at the end of the drive phase during an upward displacement of the handle that was associated with a jerk in the applied force. Force-time curves at different stroke rates showed greater variability in the initial portion of the drive phase. Perpetuation of these technique deviations may be detrimental to on-water performance. Biomechanical analyses may allow coaches to better monitor technique during ergonometric training.
在测力计训练期间，赛艇运动员可能会牺牲水上技术，以试图提高划桨输出量。这项横断面研究旨在确定测力计划桨技术的特征，这些特征可能对有效且安全的水上表现产生潜在不利影响。在44名运动员使用装有仪器的测力计进行2500米比赛时，测量了关节活动度、把手速度和施加的力。这里展示了四名受试者的结果。将他们的表现与一名有12年经验的巴塞罗那奥运会和世界冠军赛艇运动员的表现进行比较，以说明运动员是如何偏离标准水上技术的。运动学数据显示膝关节摆动以及髋关节和膝关节的异相反转。水平把手速度曲线表明，通过缩短恢复时间实现了更高的划桨频率。垂直把手速度曲线呈现出双向变化。最大振幅出现在划桨阶段结束时，此时把手向上位移，这与施加力中的一个急拉有关。不同划桨频率下的力-时间曲线显示，划桨阶段初始部分的变异性更大。这些技术偏差的持续存在可能对水上表现不利。生物力学分析可能使教练在测力计训练期间更好地监测技术。
