[Effect of prolonged preliminary static stretching of de-efferented muscle on the dynamic response of muscle receptors].

Speed of adaptation of muscle receptor discharges during static stretching of the muscle was shown to depend on the grade and duration of muscle tension reducing which, in its turn, is the function of muscle length. The increase in the receptor firing rate during the dynamic phase of muscle stretching (the dynamic response) depends both on the grade and speed of stretching and on whether the muscle is "balanced" after previous stretching. The data obtained suggest insignificant increase in the relaxed muscle length on changing of angle in the talocrural joint within the physiological range.