ABSTRACT: This study aims to evaluate the effectiveness of high-intensity interval training compared with no intervention and other types of training interventions for people with type 2 diabetes. A systematic review and meta-analysis of randomized controlled trials that used high-interval intensity training to improve anthropometric, cardiopulmonary and metabolic conditions were conducted. The search was performed during October to December 2017 using the databases PubMed, Web of Science and Physiotherapy Evidence Database (PEDro). The methodological quality of the studies was evaluated using the PEDro scale. A total of 10 articles were included in this meta-analysis. After statistical analysis, favorable results were obtained for high-intensity interval training compared with control (non-intervention) (weight standardized mean difference (SMD) -2.09; confidence interval (CI) 95% -3.41 to -0.78; body-mass index SMD -3.73; CI 95% -5.53 to -1.93; systolic blood pressure SMD -4.55; CI 95% -8.44 to -0.65; VO2max SMD 12.20; CI 95% 0.26 to 24.14; HbA1c SMD -3.72; CI 95% -7.34 to -0.10), moderate intensity continuous training (body-mass index SMD -0.41; CI 95% -0.80 to -0.03; VO2max SMD 1.91; CI 95% 0.18 to 3.64), and low intensity training (weight SMD -2.06; CI 95% -2.80 to -1.31; body-mass index SMD -3.04; CI 95% -5.16 to -0.92; systolic blood pressure SMD -2.17; CI 95% -3.93 to -0.41; HbA1c SMD -1.58; CI 95% -1.84 to -1.33). The results show that high-intensity interval training can be a useful strategy in order to improve anthropometric, cardiopulmonary and metabolic parameters in people with type 2 diabetes. Despite this, it could be essential to clarify and unify criteria in the intervention protocols, being necessary new lines of research.

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