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主动肌张力作用时间的长短同力的大小的关系,用力的时间梯度加以评定,即力F 对时间t 的阶导数:dF/dt=ΔF·(?)/dt=gradF·(?)也就是力的梯度同力的空间曲线在时间上变化速度的点积,其量纲式为MLT~(-3)。在极短的时间内发挥出极大的肌张力,我们说肌肉在作爆发式收缩时,相应的肌张力称为爆发力。爆发力的特点是肌肉收缩前纤维预先被拉长,造成肌肉拉伸预应力,使在增大收缩幅度的同时提高收缩速率,从而增大肌张力时间梯度。这一过程在任何情况下皆不可被摹拟为孤立的弹簧预拉伸后被释放的
The relationship between the length of the active muscle tension and the magnitude of the force is assessed by a force time gradient, which is the derivative of the force F with respect to time t: dF / dt = ΔF · (?) / Dt = gradF · (?) The gradient product of force and gradient of force in time is the dot product of the rate of change in time, and its dimension is MLT ~ (-3). In a very short period of time to play a great muscle tension, we say that the muscles in the explosive contraction, the corresponding muscle tone called explosive. Explosive force is characterized by pre-muscle fibers were elongated pre-stretched, resulting in muscle stretch prestress, so that increase the rate of contraction while increasing the rate of contraction, thereby increasing muscle tension time gradient. This process can not in any case be simulated as an isolated spring being pre-stretched and released