The primary goal of the research was to determine the validity and reliability of the subjective assessment of training load (sRPE) as a measure of training load in comparison to Banister's training impulse (Banister's TRIMP) and Edwards' training load (Edwards' TL) through the implementation of three identical training sessions in the taekwondo discipline of forms. The study was conducted on 11 forms competitors who first performed a progressive load test (Beep test) to determine their maximum heart rate. Then, over the next ten days, three identical training sessions, specifically situational form training, were conducted. During all training sessions, the participants' heart rates were monitored. After each training session, the participants had thirty minutes for rest and cooling down, after which sRPE ratings were collected for each participant. Pearson's (r) and Spearman's (rs) correlation coefficients were used to show the relationship between the training load variables. The results indicate a statistically significant correlation between sRPE and Banister's TRIMP in the first training session (r=0.78), while there is no statistically significant correlation between sRPE and Edwards' TL (r=0.15). In the second training session, there is no statistically significant correlation between sRPE and Banister's TRIMP (r=0.41) or between sRPE and Edwards' TL (r=0.46). However, in the third training session, there is a statistically significant correlation between sRPE and Banister's TRIMP (r=0.64) and between sRPE and Edwards' TL (r=0.70). Repeated measures ANOVA was used to determine the reliability of the subjective assessment method of training load. The results indicate that sRPE is a reliable method because there is no statistically significant difference between the three training sessions (p=0.28). Based on the analyzed results, the use of sRPE is recommended as a reliable and valid method for determining and monitoring training load in form training.