High-intensity interval training increased peak oxygen consumption by 4.56 mL·kg−1·min−1 and reduced HbA1c by 0.70% versus control in type 2 diabetes.
Does high-intensity interval training improve peak oxygen consumption and cardiometabolic risk factors in people with type 2 diabetes mellitus?
High-intensity interval training is an effective intervention for improving cardiorespiratory fitness and glycemic control in patients with type 2 diabetes.
Objective This study aimed to investigate the effects of high-intensity interval training (HIIT) versus different types of exercise or no exercise on peak oxygen consumption, muscle strength, health-related quality of life, and cardiometabolic risk factors in people with type 2 diabetes mellitus. Data Sources We searched in EMBASE, PubMed, Cochrane Central, Physiotherapy Evidence Database (PEDro), and SciELO for randomized controlled trials assessing the impact of HIIT in people with type 2 diabetes mellitus. Review Methods Study quality was evaluated using the PEDro scale, and certainty of evidence. We calculated mean differences, standardized mean difference and 95% confidence intervals. Results Sixty-two studies (2204 participants) were included. Compared to control, HIIT increased peak oxygen consumption by 4.56 mL·kg − 1 ·min − 1 (95% confidence interval 3.54 to 5.58) and reduced glycosylated hemoglobin by 0.70% (95% confidence interval −0.88 to −0.51). Improvements were also observed in insulin resistance, systolic and diastolic blood pressure, lipid profile, body mass index, and fat mass. When compared with moderate-intensity continuous training, HIIT improved peak oxygen consumption (1.30 mL·kg − 1 ·min − 1 ; 95% confidence interval 0.28 to 2.43) and glycosylated hemoglobin (−0.12%; 95% confidence interval −0.24 to −0.01). Conclusions High-intensity interval training improves peak oxygen consumption, glycosylated hemoglobin, insulin resistance, and various cardiometabolic risk factors in people with type 2 diabetes mellitus.
Vieira et al. (2026) studied this question. High-intensity interval training increased peak oxygen consumption by 4.56 mL·kg−1·min−1 and reduced HbA1c by 0.70% versus control in type 2 diabetes.