School of Human Movement and Sport Sciences, University of Ballarat, Australia.
J Sci Med Sport. 2012 Mar;15(2):110-5. doi: 10.1016/j.jsams.2011.08.005. Epub 2011 Sep 29.
To establish if there is an association between ground hardness and injury risk in junior cricket.
Nested case-series of players who played matches on specific grounds with objective ground hardness measures, within a prospective cohort study of junior community club cricket players.
Monitoring of injuries and playing exposure occurred during 434 matches over the 2007/2008 playing season. Objective assessment of the hardness of 38 grounds was undertaken using a Clegg hammer at 13 sites on 19 different junior cricket grounds on the match eve across the season. Hardness readings were classified from unacceptably low (<30 g) to unacceptably high (>120 g) and two independent raters assessed the likelihood of each injury being related to ground hardness. Injuries sustained on tested grounds were related to the ground hardness measures.
Overall, 31 match injuries were reported; 6.5% were rated as likely to be related to ground hardness, 16.1% as possibly related and 74.2% as unlikely to be related and 3.2% unknown. The two injuries likely to be related to ground hardness were sustained whilst diving to catch a ball resulting, in a graze/laceration from contact with hard ground. Overall, 31/38 (82%) ground assessments were rated as having 'unacceptably high' hardness and all others as 'high/normal' hardness. Only one injury occurred on an objectively tested ground.
It remains unclear if ground hardness is a contributing factor to the most common injury mechanism of being struck by the ball, and needs to be confirmed in future larger-scale studies.
确定初级板球比赛中地面硬度与受伤风险之间是否存在关联。
在一项对初级社区俱乐部板球运动员的前瞻性队列研究中，对在特定场地进行比赛且具有客观地面硬度测量值的运动员进行嵌套病例系列研究。
在 2007/2008 赛季的 434 场比赛中，对受伤情况和比赛暴露情况进行监测。在整个赛季的比赛前夕，在 19 个不同的初级板球场上的 13 个地点，使用 Clegg 锤对 38 个场地的硬度进行了客观评估。硬度读数从不可接受的低（<30g）到不可接受的高（>120g）进行分类，两位独立的评估者评估了每个受伤事件与地面硬度之间的关联可能性。在测试场地受伤的情况与地面硬度测量值相关。
总体而言，报告了 31 例比赛受伤事件；6.5%被评定为可能与地面硬度有关，16.1%为可能有关，74.2%为不太可能有关，3.2%为未知。两个可能与地面硬度有关的受伤事件是在跳水接球时发生的，结果与硬地面接触导致擦伤/撕裂伤。总体而言，38 个地面评估中有 31 个（82%）被评定为“硬度不可接受高”，其余均为“高/正常”硬度。只有一起受伤事件发生在经过客观测试的场地上。
地面硬度是否是被球击中这一最常见的受伤机制的一个促成因素仍不清楚，需要在未来更大规模的研究中加以证实。
