Epifano Daniel J, Ryan Samuel, Clarke Anthea C, Huynh Minh, Anderson Harvey, Middleton Kane J
Applied Biomechanics Laboratory, School of Allied Health, Human Services and Sport, La Trobe University, Melbourne, Victoria, Australia.
Sport and Exercise Science, School of Allied Health, Human Services and Sport, La Trobe University, Melbourne, Victoria, Australia.
Sports Biomech. 2022 Oct 20:1-14. doi: 10.1080/14763141.2022.2136582.
Foot strikes of the pace-bowling delivery stride produce large ground reaction forces, which may be linked to injury, yet the biomechanics of the follow-through are unknown. This study assessed tibial accelerations across the delivery and follow-through foot strikes in pace bowlers and evaluated relationships between these measures and five common pace-bowling intensity metrics. Fifteen sub-elite male pace bowlers performed deliveries at warm-up, match, and maximal intensities. Tibial accelerations were measured using tibial-mounted inertial measurement units and recorded at back- and front-foot initial and re-contacts. A trunk-worn global navigation satellite system unit measured PlayerLoad™, run-up speed, and distance. Ball speed and perceived exertion measures were also recorded. A linear mixed model showed statistical significance of prescribed intensities ( < .001) and foot strike for tibial acceleration ( < .001). Tibial accelerations showed positive increases with changes in prescribed intensity ( < .05). The greatest magnitude of tibial acceleration was found at back foot re-contact (mean ± SD; 1139 ± 319 m/s). Repeated-measures correlations of tibial acceleration between foot contacts were weak (r = 0.2-0.4). The greatest magnitude of tibial acceleration reported at back foot re-contact may have implications for injury incidence, representing an important avenue for future pace bowling research.
快速投球助跑跨步时的脚步着地会产生较大的地面反作用力，这可能与受伤有关，但后续动作的生物力学情况尚不清楚。本研究评估了快速投球手在投球和后续动作脚步着地过程中的胫骨加速度，并评估了这些测量值与五个常见的快速投球强度指标之间的关系。15名次精英男性快速投球手在热身、比赛和最大强度下进行投球。使用安装在胫骨上的惯性测量单元测量胫骨加速度，并在前后脚初始着地和再次着地时进行记录。一个佩戴在躯干上的全球导航卫星系统单元测量球员负荷、助跑速度和距离。还记录了球速和主观用力程度的测量值。线性混合模型显示规定强度（<0.001）和脚步着地对胫骨加速度有统计学意义（<0.001）。胫骨加速度随规定强度的变化呈正向增加（<0.05）。在回脚再次着地时发现胫骨加速度的最大值（平均值±标准差；1139±319米/秒²）。两脚着地之间胫骨加速度的重复测量相关性较弱（r=0.2-0.4）。回脚再次着地时报告的胫骨加速度最大值可能对受伤发生率有影响，这是未来快速投球研究的一个重要方向。
