Introduction. Subjective perception of effort, measured via session Rating of Perceived Exertion (sRPE), is a valuable tool for optimizing training load, preventing overtraining, and enhancing athlete performance in Brazilian Jiu-Jitsu (BJJ). Objective. This systematic review and meta-analysis investigated the application of sRPE to assess ITL in BJJ, focusing on its effectiveness for understanding training intensity and preventing overtraining. Methods. A systematic search was conducted using PubMed, SCIELO, and Web of Science to identify studies on sRPE in BJJ. Data extraction focused on sample size, athlete characteristics, and training load control mechanisms. A total of nine studies met the inclusion criteria and were included in the review and meta-analysis. Key outcomes, including pre-combat and post-combat sRPE values, were analyzed to evaluate physical stress and training intensity. Results. The review revealed significant increases in sRPE values post-combat compared to pre-combat, indicating high levels of physical stress generated by both simulated combats and BJJ competitions. Similar responses across different sRPE measures demonstrated consistency in intensity across interventions. However, data heterogeneity and small sample sizes in some studies highlight the need for further research with standardized methodologies. Conclusion. This research demonstrated a significant post-combat increase in sRPE, emphasizing the intensity of BJJ training and competitions. It also underscores the importance of standardized protocols to enable comprehensive comparisons across studies. By improving training periodization and athlete management, this study contributes to advancing the application of sRPE in optimizing performance and preventing overtraining in BJJ athletes.