The aim of this systematic review was to determine at what levels lactates and heart rate move as physiological indicators in taekwondo combat. It is this kind of work of coaches that helps to create training and indicates what they need to develop in athletes during the training process. The studies included in this review measured physiological indicators before, at the end of each round, and finally at the end of the entire fight. The results show the heart rate and the presence of lactate in the blood. The following databases were used to search the literature: Google Scholar, PubMed, and Scopus. The research sample included sports at the national level, accurate representativeness, elite athletes, and only one study took an amateur as a sample in its research. The age group of athletes included in the research varied from 15 to 29 years. Although the majority of the sample was male, female participants were included in the studies. The highest level of lactate in the blood is 11.9 in the first round, or 8.4 ± 3.5 taking into account all studies, and such a result indicates the transition of the anaerobic and aerobic threshold to the socalled maximum lactate steady state. The highest lactate values in all modification studies are at the end of the match. The lowest value of lactate was recorded in studies where the research sample was represented by amateur taekwondo athletes, with an average value of 6.53 ± 2.01 mmol / L. Participants in matches lasting 3 times 2 minutes had slightly lower lactate values than participants in fights lasting 3 times 2 minutes regardless of the duration of the break between rounds. Heart rate, as well as lactates, progressively increases with each subsequent round, regardless of whether the fight is of a simulated or competitive type, except in one research where after the second round simulation the heart rate of the athlete experiences stagnation at 179 rpm. Athletes who participated in fights lasting 3 times 2 minutes had a slightly lower heart rate (188 ± 8 beats / min) than athletes participated in the match lasted 3 times 3 minutes, and their heart rate was 197 ± 2 rpm. Changes in heart rate in the blood show a high intensity of competition.