Department of Orthopaedic Surgery, UZ Pellenberg, K.U. Leuven, Leuven, Belgium.
Br J Sports Med. 2012 Dec;46(15):1078-83. doi: 10.1136/bjsports-2012-090938. Epub 2012 Jul 28.
Football turf is increasingly used in European soccer competition. Little is known on the rotational torque that players experience on these fields. High rotational torques between the shoe outsole and the sports surface has been correlated with torsional injuries of the lower limb and knee.
To evaluate the effect of six parameters that could influence the rotational torque between the shoe outsole and the latest generation football turf.
Controlled laboratory study.
A testing apparatus was constructed to measure the peak torque generated during a controlled rotation of the foot. Six parameters that could potentially influence the frictional forces, were considered: (1) the sports surface, (2) the shoe outsole cleat design, (3) the weather conditions, (4) the weight, (5) the presence of an impact and (6) the direction of rotation.
The football turf without infill showed significantly lower frictional torques than natural grass whereas a football turf with sand/rubber infill had significantly higher torques. Blades were associated with significantly higher torques than studs on natural grass and on one football turf with sand/rubber infill. Dry weather was associated with higher torques only for the football turf without infill. The torque increased linearly and significantly with an increasing vertical load. The rotational torque increased significantly following an impact. Torques on external rotational movements were significantly higher with blades.
Important differences in rotational torques are found and could be seen as potential risk factors for torsional injuries of the lower limb.
足球草皮在欧洲足球比赛中越来越多地被使用。对于球员在这些场地上所经历的旋转扭矩知之甚少。鞋子外底和运动表面之间的高旋转扭矩与下肢和膝盖的扭转损伤有关。
评估可能影响鞋子外底和最新一代足球草皮之间旋转扭矩的六个参数的影响。
对照实验室研究。
构建了一个测试装置来测量在受控旋转脚时产生的峰值扭矩。考虑了六个可能影响摩擦力的参数：（1）运动表面，（2）鞋子外底钉设计，（3）天气条件，（4）重量，（5）存在冲击和（6）旋转方向。
无填充的足球草皮的摩擦力扭矩明显低于天然草皮，而沙/橡胶填充的足球草皮的摩擦力扭矩明显更高。在天然草皮和沙/橡胶填充的一种足球草皮上，刀片与钉鞋相比，摩擦力扭矩明显更高。干燥的天气仅对无填充的足球草皮产生更高的扭矩。随着垂直载荷的增加，扭矩线性且显著增加。撞击后扭矩显著增加。刀片的外部旋转运动的扭矩明显更高。
发现了旋转扭矩的重要差异，这可能被视为下肢扭转损伤的潜在危险因素。
