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相关概念视频

Metabolic Rate01:25

Metabolic Rate

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The human body is a powerhouse of energy, with every cell performing numerous functions that require energy. This energy production and consumption is measured by the metabolic rate, which quantifies the total heat generated by all the body's chemical reactions and mechanical work. This measurement helps to determine the rate of kilocalorie (kcal) consumption needed to fuel all ongoing activities.
The Basal Metabolic Rate (BMR) measures the energy expended at rest.
Several factors influence...
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Using Gold-standard Gait Analysis Methods to Assess Experience Effects on Lower-limb Mechanics During Moderate High-heeled Jogging and Running
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通过基于模拟的观测步行分析来评估行走的潜在生物力学目标中的风格差异.

McKenna C Everett, Wentao Li, Ann Majewicz Fey

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    此摘要是机器生成的。

    新手观察者可以在模拟中根据生物机械目标部分区分行走风格. 然而,电机控制冗余性限制了这些步态特征的观察分辨率.

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    科学领域:

    • 生物力学 生物力学
    • 人类运动科学科学 人类运动科学
    • 计算建模 计算建模

    背景情况:

    • 临床步态分析通常依赖于观察方法和分类等级来识别病理.
    • 通过视觉观察来评估步态的微妙生物力学差异仍然是临床医生面临的挑战.

    研究的目的:

    • 通过使用风格标签,评估初学者观察者在模拟行走中识别特定生物力学目标的能力.
    • 为了确定视觉视角是否影响了基于物理的模拟中的步行行为特征.

    主要方法:

    • 为五个受试者模型生成了75个肌肉驱动的步行模拟,变化了五个生物机械目标和三个视觉视角.
    • 利用计算的肌肉控制和直接调配来优化基于代谢成本和肌肉激活等目标的模拟.
    • 雇佣了100名群众工人来使用风格标签对模拟进行评分,然后进行多项逻辑回归分析.

    主要成果:

    • 观察者对负载和激活的评分显著预测了肌肉激活优化的运动.
    • 激活评级可以预测运动的前景,而平衡评级只有从正面的角度来看才有意义.
    • "群众的智慧"可以辨别出一些生物力学目标,但电机控制冗余性限制了观测的准确性.

    结论:

    • 对步态模拟的视觉观察可以确定一些潜在的生物力学目标.
    • 观察步态分析的有效性受到人类运动控制策略中固有的冗余性的限制.
    • 进一步的研究可能会探索在临床和研究环境中客观地评估步态的改进方法.