School of Science and Technology, Nottingham Trent University , Nottingham, UK.
School of Sport, Exercise and Health Sciences, Loughborough University , Loughborough, UK.
J Sports Sci. 2020 Sep;38(18):2054-2062. doi: 10.1080/02640414.2020.1770407. Epub 2020 May 31.
Cricket fast bowling is a dynamic activity in which a bowler runs up and repeatedly delivers the ball at high speeds. Experimental studies have previously linked ball release speed and several technique parameters with conflicting results. As a result, computer simulation models are increasingly being used to understand the effects of technique on performance. This study evaluates a planar 16-segment whole-body torque-driven simulation model of the front foot contact phase of fast bowling by comparing simulation output with the actual performance of an elite fast bowler. The model was customised to the bowler by determining subject-specific inertia and torque parameters. Good agreement was found between actual and simulated performances with a 4.0% RMS difference. Varying the activation timings of the torque generators resulted in an optimised simulation with a ball release speed 3.5 m/s faster than the evaluation simulation. The optimised technique used more extended front ankle and knee joint angles, increased trunk flexion and a longer delay in the onset of arm circumduction. These simulations suggest the model provides a realistic representation of the front foot contact phase of fast bowling and is suitable to investigate the limitations of kinematic or kinetic variables on fast bowling performance.
板球快速投球是一项充满活力的运动，投球手在跑动中不断以高速投出球。先前的实验研究将球的释放速度和几个技术参数联系起来，但结果相互矛盾。因此，越来越多的计算机模拟模型被用来了解技术对表现的影响。本研究通过将模拟输出与一名优秀快速投球手的实际表现进行比较，评估了快速投球前脚触地阶段的 16 节平面整体扭矩驱动仿真模型。通过确定特定于主体的惯性和扭矩参数，对模型进行了定制。实际表现和模拟表现之间的吻合度很好，均方根差异为 4.0%。改变扭矩发生器的激活时间，得到了一个优化的模拟，球的释放速度比评估模拟快 3.5 米/秒。优化后的技术使用了更伸展的前脚踝关节和膝关节角度，增加了躯干的屈曲，并延迟了手臂外展的起始。这些模拟表明，该模型提供了对快速投球前脚触地阶段的现实表现，并适合研究运动学或动力学变量对快速投球表现的限制。
