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首页> 外文会议>International Symposium on Biomechanics in Sports vol.2; 20050822-27; Beijing(CN) >SYMMETRY OF GROUND REACTION FORCE MEASURES IN SUCCESSIVE FOOTFALLS DURING RUNNING
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SYMMETRY OF GROUND REACTION FORCE MEASURES IN SUCCESSIVE FOOTFALLS DURING RUNNING

机译：连续足球跑时地面反应力的对称性。

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Historically ground reaction forces have taken place using a single force platform during running. Dainty and Norman (1987) stated that force platforms must be designed to accommodate foot contact with a minimum necessity of targeting the platform. Such statements are verified by differences in ground reaction force variables when a subject has to alter their stride pattern on the approach to the plate. Differences have been primarily evident during the impact phase for both walking and running (Challis, 2001). The alteration of these kinetic variables was related to modification of lower limb angles at contact with the platform (Challis, 2001). It can be concluded that targeting of the force platform in gait analysis would produce kinetic measures that are not representational, or typical of subjects standard foot contact pattern.rnMany of the problems of targeting can be eliminated by sound experimental procedures, such as adequate approach and run-off distances, clear verbal instructions, and ensuring the subject maintains optical focus away from the platform surface. In addition, it is possible to measure footstrikes on more than one force platform. Providing the subject has no major biomechanical deficit, or injury at the time of testing, measurement of successive footstrikes should not yield ground reaction force differences in normal walking or running (Dyson and Janaway, 2000). However, recent results in running (Smith et al., 2004) revealed vertical impact loading rate and braking forces to be greater on the second of two successive footstrikes in soccer players. It was proposed this result could be attributed to increased muscular development on the subjects preferred limb. The aim of the current investigation is to assess the symmetry of successive footstrikes during running, with a secondary aim of investigating differences in force between the preferred and non-preferred limb.
机译：历史上，地面反作用力是在行驶过程中使用单个力平台发生的。 Dainty和Norman（1987）指出，必须设计力量平台以适应脚的接触，并以最小的需要瞄准平台。当受试者必须在接近板块时改变其步幅模式时，地面反作用力变量的差异可以证明这种说法。在步行和跑步的影响阶段，差异最明显（Challis，2001）。这些动力学变量的改变与平台接触时下肢角度的改变有关（Challis，2001）。可以得出结论，在步态分析中以力平台为目标将产生不具有代表性的或典型的标准脚接触模式的动力学措施.rnn可以通过合理的实验程序消除许多目标问题，例如适当的方法和距离，清晰的口头指示，并确保对象保持光学焦点远离平台表面。此外，可以在多个力平台上测量脚的敲击。如果受试者在测试时没有重大的生物力学缺陷或受伤，则连续脚步的测量不应在正常的步行或跑步中产生地面反作用力差异（Dyson and Janaway，2000）。但是，最近的跑步成绩（Smith等人，2004）显示，足球运动员两次连续两次脚击中的第二次，垂直冲击负荷率和制动力会更大。有人提出这个结果可以归因于受试者偏爱肢体的肌肉发达。当前研究的目的是评估跑步过程中连续踩踏的对称性，其次要目的是研究优选肢体和非优选肢体之间的力差。

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