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首页> 外文期刊>Physical Culture: journal of sports sciences and physical education >Strength and power of knee extensor muscles
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Strength and power of knee extensor muscles

机译：膝盖伸肌的力量和力量

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In the studies of human neuromuscular function, the function of leg muscles has been most often measured, particularly the function of the knee extensors. Therefore, this review will be focused on knee extensors, methods for assessment of its function, the interdependence of strength and power, relations that describe these two abilities and the influence of various factors on their production (resistance training, stretching, movement tasks, age, etc.). Given that it consists of four separate muscles, the variability of their anatomical characteristics affects their participation in strength and power production, depending on the type of movement and motion that is performed. Since KE is active in a variety of activities it must be able to generate great strength in a large and diverse range of muscle lengths and high shortening velocities, in respect to different patterns of strength production, and thus different generation capacities within the muscle (Blazevich et al., 2006). It has been speculated that KE exerts its Pmax at workloads close to subject's own body weight or lower (Rahmani et al., 2001), which is very close to the maximum dynamic output hypothesis (MDI) of Jaric and Markovic (2009). Changes under the influence of resistance training or biological age are variously manifested in muscle's morphological, physiological and neural characteristics, and thus in strength and power. Understanding the issues related to strength and power as abilities of great importance for daily activities, is also important for sports and rehabilitation. Performances improvement in sports in which leg muscles strength and power are crucial, as well as recovery after the injuries, are largely dependent on the research results regarding KE function. Also, the appropriate strength balance between knee flexors and extensors is important for the knee joint stability, so that the presence of imbalance between these two muscle groups might be a risk factor for the occurrence of injuries.
机译：在人类神经肌肉功能的研究中，最经常测量腿部肌肉的功能，尤其是膝盖伸肌的功能。因此，本综述将集中于膝盖伸肌，其功能评估方法，力量和力量的相互依赖性，描述这两种能力的关系以及各种因素对其产生的影响（阻力训练，伸展运动，运动任务，年龄）等）。由于它由四个独立的肌肉组成，其解剖特征的可变性会影响其参与力量和力量产生的程度，具体取决于执行的运动和动作的类型。由于KE活跃于各种活动中，因此就不同的力量产生方式以及因此肌肉内部的不同产生能力而言，KE必须能够在大范围的各种肌肉长度和高的起伏速度中产生巨大的力量（Blazevich等人，2006）。据推测，KE在接近受试者自身体重或更低的工作负荷下施加其Pmax（Rahmani等，2001），这与Jaric和Markovic（2009）的最大动态输出假设（MDI）非常接近。在阻力训练或生物年龄的影响下的变化在肌肉的形态，生理和神经特征以及力量和力量方面表现出不同的表现。将与力量和力量相关的问题理解为对日常活动至关重要的能力，对于运动和康复也很重要。在腿部肌肉的力量和力量至关重要的运动中，以及受伤后的恢复，其运动表现的提高很大程度上取决于有关KE功能的研究结果。同样，膝盖屈肌和伸肌之间适当的力量平衡对于膝盖关节的稳定性也很重要，因此，这两个肌肉群之间的不平衡可能是受伤发生的危险因素。

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