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Electrical muscle stimulation (EMS) can be defined a non-conventional method as being applied electrical currents to the muscle tissues or motor points in order to performance improvement in sport. The effectiveness of EMS training method is related to the intensity of electrical currents applied during training sessions. The tolerance to electromyostimulation can be define as the ability to tolerate progressively increasing current intensity. Despite that very little information exists related to tolerance to electrical currents of muscle and nervous. In order to know, whether the human body develop tolerance to electrical currents or not, is important for the effective use of this method. The aim of this study is to examine that whether the tolerance against to maximum comfortably tolerated electrical current intensity implemented during five weeks of isometric lower body electromyostimulation (LB-EMS) training program. Eighteen healthy students at sports sciences faculty between the ages of 18-27 implemented in a 5-week isometric LB-EMS training program. The results indicate that there is significant tolerance (p <0.05) were found against the electrical current. The rapid increase in tolerance at the initial phase of the 5-week EMS training has shown the tolerance against electrical current, an increase again afterwards followed by that phase, and that increase is observed a slight decrease in the last period of training followed.