目的:人造草皮的全球性应用以及运动员参与程度促使我们有必要研究它对足球运动员的损伤因素。本研究旨在调查在天然草皮与人工草皮上女足运动员与草皮之间的相互作用。方法:8位大学水平的女足运动员分别在常规天然草皮球场(NT)和3G人...目的:人造草皮的全球性应用以及运动员参与程度促使我们有必要研究它对足球运动员的损伤因素。本研究旨在调查在天然草皮与人工草皮上女足运动员与草皮之间的相互作用。方法:8位大学水平的女足运动员分别在常规天然草皮球场(NT)和3G人工草皮球场(AT)上表演非预期30o和60o切削动作。用一台自动动作捕捉系统(Coda Sport CXS System,200Hz)对切割动作减速早期3D踝和膝关节角度进行量化,从足部着地到承重达到着地阶段20%对其进行确定。用双因素(切割角度,草皮)方差对其差异进行统计学分析,α水平设为p<0.05,并报告Cohen’sd效应量。结果:在人工草皮上发现有膝外翻和内旋转减少的趋势,这表明膝损伤风险降低。这一发现说明人工草皮并不亚于天然草皮,并可能会降低膝损伤风险。在人工草皮上足部着地时踝关节对背屈和内翻程度增加影响很大,踝关节内翻和外旋转程度增大也受到很大影响。结论:这些发现为女球员在人工草皮上踢球提供了支持,且并未证明在人工草皮上踢球损伤风险会增加。脚踝反应不明确,需要进一步研究。这一初步研究为更细致的研究提供了平台;强调随着人工草皮引入,探索足球运动及损伤的生物力学变化非常重要。展开更多
Background: Artificial turf is considered a feasible global alternative to natural turf by many sports governing bodies. Consequently, its ability to provide a safe and consistent playing surface regardless of climate...Background: Artificial turf is considered a feasible global alternative to natural turf by many sports governing bodies. Consequently, its ability to provide a safe and consistent playing surface regardless of climate becomes essential. The aims of this study were to determine the effects of artificial surface temperature on:(1) mechanical properties of the turf and(2) the kinematics of a turf-sport related movement.Methods: Two identical artificial turf pitches were tested: one with a cold surface temperature(1.8°C–2.4°C) and one with a warm surface temperature(14.5°C–15.2°C). Mechanical testing was performed to measure the surface properties. Four amateur soccer players performed a hurdle jump to sprint acceleration movement, with data(contact time, step length and hip, knee and ankle kinematics) collected using CODASport(200 Hz).Results: The temperature difference had a significant influence on the mechanical properties of the artificial turf, including force absorption,energy restitution, rotational resistance, and the height where the head injury criterion was met. Both step length(p = 0.008) and contact time(p = 0.002) of the initial step after the landing were significantly longer on the warm surface. In addition, significant range of motion and joint angular velocity differences were found.Conclusion: These findings highlight different demands placed on players due to the surface temperature and suggest a need for coaches,practitioners, and sports governing bodies to be aware of these differences.展开更多
文摘目的:人造草皮的全球性应用以及运动员参与程度促使我们有必要研究它对足球运动员的损伤因素。本研究旨在调查在天然草皮与人工草皮上女足运动员与草皮之间的相互作用。方法:8位大学水平的女足运动员分别在常规天然草皮球场(NT)和3G人工草皮球场(AT)上表演非预期30o和60o切削动作。用一台自动动作捕捉系统(Coda Sport CXS System,200Hz)对切割动作减速早期3D踝和膝关节角度进行量化,从足部着地到承重达到着地阶段20%对其进行确定。用双因素(切割角度,草皮)方差对其差异进行统计学分析,α水平设为p<0.05,并报告Cohen’sd效应量。结果:在人工草皮上发现有膝外翻和内旋转减少的趋势,这表明膝损伤风险降低。这一发现说明人工草皮并不亚于天然草皮,并可能会降低膝损伤风险。在人工草皮上足部着地时踝关节对背屈和内翻程度增加影响很大,踝关节内翻和外旋转程度增大也受到很大影响。结论:这些发现为女球员在人工草皮上踢球提供了支持,且并未证明在人工草皮上踢球损伤风险会增加。脚踝反应不明确,需要进一步研究。这一初步研究为更细致的研究提供了平台;强调随着人工草皮引入,探索足球运动及损伤的生物力学变化非常重要。
文摘Background: Artificial turf is considered a feasible global alternative to natural turf by many sports governing bodies. Consequently, its ability to provide a safe and consistent playing surface regardless of climate becomes essential. The aims of this study were to determine the effects of artificial surface temperature on:(1) mechanical properties of the turf and(2) the kinematics of a turf-sport related movement.Methods: Two identical artificial turf pitches were tested: one with a cold surface temperature(1.8°C–2.4°C) and one with a warm surface temperature(14.5°C–15.2°C). Mechanical testing was performed to measure the surface properties. Four amateur soccer players performed a hurdle jump to sprint acceleration movement, with data(contact time, step length and hip, knee and ankle kinematics) collected using CODASport(200 Hz).Results: The temperature difference had a significant influence on the mechanical properties of the artificial turf, including force absorption,energy restitution, rotational resistance, and the height where the head injury criterion was met. Both step length(p = 0.008) and contact time(p = 0.002) of the initial step after the landing were significantly longer on the warm surface. In addition, significant range of motion and joint angular velocity differences were found.Conclusion: These findings highlight different demands placed on players due to the surface temperature and suggest a need for coaches,practitioners, and sports governing bodies to be aware of these differences.
