Modeling the force-length-velocity-activation relationship 正如我们所看到的,肌肉产生的力量取决于其纤维的长度和速度。肌肉力量也受到运动单元发射频率和招募的调节。在最大激活状态( a(t) = 1 )时,力量、长度和速度之间的功能关系可以用图4.17所示,其中在特定长度和速度下的产生力量的能力简单地是对应的力-长度...
This is related, in part, to the reduction in muscular strength and power caused by a loss of skeletal muscle mass (sarcopenia) and changes in muscle architecture. Due to these changes, the force–velocity (f–v) relationship of human muscles alters with age. This change has functional ...
Definition The force-velocity relationship describes how muscle force depends upon the velocity of movement or vice versa . Characteristics Quantitative Description The seminal experiments of A.V. Hill showed that the velocity of shortening in actively contracting skeletal muscle depended upon the force ...
force-velocity relationship [fɔrs vəˈlɑsɪti rɪˈleʃənˌʃɪp] 释义 [医]张力-速度关系
We investigated the mechanism underlying the differences in the FV relationship. We hypothesized that for a given force, Vmax is greater during work loop experiments because during stretch a muscle can store elastic energy that can be recovered upon shortening. It is possible that the giant elastic...
It is important to note that cardiac muscle fibers do not operate on a single force-velocity curve. This relationship is altered by changes in both preload and inotropy. The former shares some similarities with skeletal muscle; the latter, however, is unique to cardiac muscle. ...
THE relationship between the velocity of shortening v and a constant load w on an excited striated muscle is given by Hill's equation: Open image in new window where P is the isometric tension and a , b are constants. Hill 1 first derived this relation experimentally. Later work 2 has ...
摘要: The force–velocity relationship for a single muscle fibre is commonly described using a hyperbolic equation. In contrast, in-vivo experiments on movements requiring coordination of multiple joints hav关键词: Musculoskeletal Modelling Muscle Mechanics Force - velocity relationship Cycling ...
A mathematical model of the force: velocity properties of muscle with various combinations of fast- and slow-twitch fibres may provide insight into why specific velocities may give better predictions of fibre type distribution. In this paper, a mathematical model of the force:velocity relationship ...
Although these findings eliminate the force-velocity relationship as the main explanation for changes in EMG, it cannot be ruled out that other muscle contractile properties, such as history dependence of muscle force, determine muscle activation levels in the task that was studied. 展开 ...