ENERGETIC COST AND STABILITY DURING HUMAN WALKING AT THE PREFERRED STRIDE FREQUENCY
ENERGETIC COST AND STABILITY DURING HUMAN WALKING AT THE PREFERRED STRIDE FREQUENCY
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DOI：
10.1080/00222895.1995.9941708
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发表时间：
1995-06-01
影响因子：
1.4
通讯作者：
HAMILL, J
中科院分区：
文献类型：
--
作者：
HOLT, KG;JENG, SF;HAMILL, J
本文探讨了动力和最优性约束下优选运动模式的可能性，以及优选和预测行走频率的能量和动力约束。参与者被要求在跑步机上以他们喜欢的频率行走，以腿的混合钟摆-弹簧模型的共振频率预测，频率为预测频率的+/-15%，+/-25%,+/-35%。以首选的和预测的频率行走导致最小的代谢成本和最大的头部和关节活动的稳定性。机械能守恒在任何条件下都是恒定的。头部比关节更稳定。关节似乎在为头部服务，以保持稳定的轨迹。本研究的主要发现表明，在选择首选步行频率时，能量（生理）和稳定性约束之间存在互补关系。在完整的生物系统中，多个子系统可能参与约束观察到的宏观行为。该研究的方法和结果表明，了解动态控制结构如何产生的一个有用的方法是研究在未受损和受损人群中作为熟练运动模式约束的潜在标准。
The possibility that preferred modes of locomotion emerge from dynamical and optimality constraints and the energetic and dynamical constraints on preferred and predicted walking frequency are explored in this article. Participants were required to walk on a treadmill at their preferred frequency, at a frequency predicted as the resonance of a hybrid pendulum-spring model of the legs, and at frequencies +/-15%, +/-25%, +/-35% of the predicted frequency. Walking at the preferred and predicted frequencies resulted in minimal metabolic costs and maximal stability of the head and joint actions. Mechanical energy conservation was constant across conditions. The head was more stable than the joints. The joints appeared to be in service of the head in maintaining a stable trajectory. The major findings of this study suggest a complementary relationship between energetic (physiological) and stability constraints in the adoption of a preferred frequency of walking. Multiple subsystems may be involved in constraining observed macroscopic behavior in intact biological systems. The approach and results of the study imply that a useful tack in understanding how dynamical control structures arise is to study the potential criteria that serve to act as constraints on skilled movement patterns in unimpaired and impaired populations.