The Effect of Potentialization after Electro-Stimulation Activation on Vertical Heel Performance

Another method of inducing PAP is electro-stimulation because it is a method that initially causes a contraction of fibers type II (rapid contraction), specific to induce PAP [9,10] Electro-stimulation consists of a method that uses electric currents that stimulate the muscle externally and afferently through electrodes positioned on the belly of the target musculature, promoting involuntary contraction, which in turn occurs inversely to voluntary contraction, starting from type II fibers (rapid contraction), strength and power characteristics, for fiber type I (slow shrinkage), resistance characteristics, because they have axons of thicker caliber and more superficial the electrical impulse tends to reach the fiber type II first, besides producing considerable recruitment of motor units, causing no or almost no impact on the joints [10,11]. Electro-stimulation can be a solution for selfperformance because it does not bring this tension overload because of mechanical overload, nor metabolic, because of its exogenous and afferent stimulus. [...]this study aimed to investigate the effects of electro-stimulation compared to the plyometric protocol, on the PAP and the fatigue rate, during the performance in the vertical jump. On the first day, before the first experimental protocol was performed, data were collected to characterize the sample (i.e., age, body mass, height, BMI calculation, and heart rate). After the data was collected, the evaluated person was familiarized with the electro-stimulation device by measuring the pain threshold for quadriceps (QT) and gastrocnemius (GT) for the prescription of the electro-stimulation protocol by the EVA protocol (Visual Analog Scale) which consists of a horizontal line with facial expressions and enumerated from 0 to 10, where from 0 to 2 characterizes absence or almost no pain, from 3 to 7 characterizes moderate pain and from 8 to 10 characterizes a high degree of pain [14].