High-Intensity Interval Training Improves Metabolic Health
(HealthDay News) — High-intensity interval training (HIIT) seems to be beneficial for improving metabolic health, according to a meta-analysis published in the November issue of Obesity Reviews.
Charlotte Jelleyman, from the University of Leicester in the United Kingdom, and colleagues conducted a meta-analysis to quantify the effects of HIIT versus control conditions (CON) or continuous training (CT) on markers of glucose regulation and insulin resistance. Data were included for 50 studies that involved adult participants and training for two weeks or more.
The researchers found that, compared with both CON and CT, HIIT correlated with a reduction in insulin resistance (HIIT versus CON: P = 0.009; HIIT versus CT, P = 0.036). Hemoglobin A1c decreased by 0.19 percent and body weight by 1.3 kg with HIIT versus CON (P = 0.021 and P < 0.001). No significant between-group differences were seen in other outcomes. Participants at risk of or with type 2 diabetes experienced reductions in fasting glucose with HIIT versus CON (P < 0.001).
"HIIT appears effective at improving metabolic health, particularly in those at risk of or with type 2 diabetes," the authors write. "Larger randomized controlled trials of longer duration than those included in this meta-analysis are required to confirm these results."