School of Human Movement and Sport Sciences, University of Ballarat, Australia.
J Sci Med Sport. 2012 Jul;15(4):305-10. doi: 10.1016/j.jsams.2011.12.003. Epub 2012 Jan 17.
To describe the risk and details of injuries associated with ground hardness in community level Australian football (AF).
Prospective injury surveillance with periodic objective ground hardness measurement.
112 ground hardness assessments were undertaken using a Clegg hammer at nine locations across 20 grounds, over the 2007 and 2008 AF seasons. Details of 352 injuries sustained by community level players on those grounds were prospectively collected as part of a large randomised controlled trial. The ground location of the injury was matched to the nearest corresponding ground hardness Clegg hammer readings, in gravities (g), which were classified from unacceptably low (<30 g) to unacceptably high hardness (>120 g).
Clegg hammer readings ranged from 25 to 301 g. Clegg hammer hardness categories from low/normal to high/normal were associated with the majority of injuries, with only 3.7% (13 injuries) on unacceptably high hardness and 0.3% (1 injury) on the unacceptably low hardness locations. Relative to the preferred range of hardness, the risk of sustaining an injury on low/normal hardness locations was 1.31 (95%CI: 1.06-1.62) times higher and 1.82 (95%CI: 1.17-2.85) times higher on locations with unacceptably high hardness. The more severe injuries occurred with low/normal ground hardness.
Despite the low number of injuries, the risk of sustaining an injury on low/normal and unacceptably hard grounds was significantly greater than on the preferred range of hardness. Notably, the severity of the injuries sustained on unacceptably hard grounds was lower than for other categories of hardness.
描述澳大利亚足球（AF）社区级别中与地面硬度相关的受伤风险和细节。
使用 Clegg 锤进行定期客观地面硬度测量的前瞻性损伤监测。
在 2007 年和 2008 年的 AF 赛季中，在 20 个场地的 9 个地点进行了 112 次地面硬度评估。作为一项大型随机对照试验的一部分，前瞻性地收集了在这些场地上由社区级球员遭受的 352 次伤害的详细信息。受伤的场地位置与最近的相应地面硬度 Clegg 锤读数相匹配，以重力（g）表示，地面硬度分为不可接受的低（<30g）到不可接受的高（>120g）。
Clegg 锤读数范围从 25 到 301g。从低/正常到高/正常的 Clegg 锤硬度类别与大多数伤害相关，仅有 3.7%（13 次受伤）发生在不可接受的高硬度和 0.3%（1 次受伤）发生在不可接受的低硬度。与硬度的首选范围相比，在低/正常硬度场地受伤的风险高 1.31 倍（95%CI：1.06-1.62），在不可接受的高硬度场地受伤的风险高 1.82 倍（95%CI：1.17-2.85）。更严重的伤害发生在低/正常地面硬度。
尽管受伤人数较少，但在低/正常和不可接受的坚硬地面上受伤的风险明显大于在首选硬度范围内。值得注意的是，在不可接受的坚硬地面上受伤的严重程度低于其他硬度类别。
