School of Technology and Health, Royal Institute of Technology, Stockholm, Sweden.
J Sports Sci. 2011 Feb;29(3):253-62. doi: 10.1080/02640414.2010.523088.
The correlation between mechanical factors of running and running economy as measured by metabolic cost is a subject of much interest in the study of locomotion. However, no change in running technique has been shown to result in an immediate improvement in running economy on an intra-individual basis. To evaluate the effect of a modified running technique, it is probably necessary that the individual trains with the new technique for a longer period using a feedback system to control the new kinematics. In this study, we examine the feasibility of using visual and auditory feedback to adapt running technique according to a simplistic model of the mechanical cost of running. The model considers only the mechanical work against gravity, which is the product of the magnitude of the vertical displacement of the runner's centre of mass and the step-frequency. In the experiments reported here, 18 trained runners, running at 16 km · h(-1) on a treadmill, were given feedback on these parameters together with indicated target levels. In almost all cases, the runners were able to adjust their technique accordingly.
在运动研究中，人们对跑步的机械因素与代谢成本所衡量的跑步经济性之间的相关性非常感兴趣。然而，没有证据表明改变跑步技术会立即提高个体的跑步经济性。为了评估改进的跑步技术的效果，个体可能需要使用反馈系统，用新技术进行更长时间的训练，以控制新的运动学。在这项研究中，我们根据一个简化的跑步力学成本模型，检查了使用视觉和听觉反馈来适应跑步技术的可行性。该模型仅考虑了与重力相关的机械功，它是跑步者质心垂直位移幅度与步频的乘积。在本研究中，18 名受过训练的跑步者在跑步机上以 16 公里/小时的速度跑步，他们得到了这些参数的反馈以及指示的目标水平。在几乎所有情况下，跑步者都能够相应地调整他们的技术。
