Department of Orthopaedic Surgery, The Ohio State University Sports Medicine Center, 2050 Kenny Road, Columbus, OH 43221, USA.
Med Sci Sports Exerc. 2010 Sep;42(9):1754-9. doi: 10.1249/MSS.0b013e3181d7d307.
An increase in traction between the shoe and a playing surface can result in increased forces to be absorbed by the structures of the lower extremity. Alternately, decreased traction causes impaired performance. We hypothesized that changes in the coefficient of friction (CoF) will affect subjective and objective measures of performance for an agility maneuver.
Thirty subjects were asked to perform a functional agility maneuver under CoF conditions from 0.3 to 0.7. Subjects performed this agility maneuver over a force plate and were asked to complete a questionnaire evaluating their ability to perform the task under various CoF conditions.
Time to complete the task decreased as CoF increased (from 3.1 +/- 0.6 s at CoF 0.3 to 2.6 +/- 0.5 s at CoF 0.5). Peak force, CoF max force plate, and subjective score all increased as CoF increased up to 0.5. CoF of 0.5 or above did not significantly change the subject's ability to perform the cutting maneuver either subjectively or objectively.
The CoF of 0.5 was deemed adequate to complete the task for this study. Values above CoF 0.5 did not lead to better performance. More studies are needed to build on these findings to establish criteria on safe shoe-surface interactions in athletic practice and play.
鞋与运动表面之间的牵引力增加会导致下肢结构承受更大的力。相反，牵引力减小会导致运动表现受损。我们假设摩擦系数（CoF）的变化将影响敏捷性动作的主观和客观表现测量。
30 名受试者被要求在 CoF 条件下（从 0.3 到 0.7）进行功能性敏捷性动作。受试者在测力板上进行此敏捷性动作，并被要求完成一份问卷，评估他们在各种 CoF 条件下完成任务的能力。
完成任务的时间随着 CoF 的增加而减少（从 CoF 为 0.3 时的 3.1 +/- 0.6 秒减少到 CoF 为 0.5 时的 2.6 +/- 0.5 秒）。峰值力、CoF 最大测力板和主观评分都随着 CoF 的增加而增加，最高可达 0.5。CoF 为 0.5 或更高并不会显著改变受试者主观或客观完成切割动作的能力。
在这项研究中，CoF 为 0.5 被认为足以完成任务。CoF 高于 0.5 并不会导致更好的表现。需要进一步的研究来建立运动实践和比赛中安全鞋-表面相互作用的标准。
