Mixed
Long-term high-intensity interval training (LT-HIIT, ≥12 weeks) significantly improves waist circumference, body fat percentage, VO2 max, resting heart rate, systolic blood pressure, and diastolic blood pressure in overweight/obese populations.
If you are overweight or obese, committing to long-term high-intensity interval training (12 weeks or more) can significantly reduce your waist circumference and body fat, improve your aerobic fitness, lower your resting heart rate, and reduce both systolic and diastolic blood pressure. Consistency over time is key to seeing these broad cardiometabolic benefits.
Long-term (LT) HIIT (≥12 weeks) significantly improved waist circumference (SMD −0.20, 95% CI −0.38 to −0.01; p<0.05), % body fat (SMD −0.40, 95% CI −0.74 to −0.06; p<0.05), VO2 max (SMD 1.20, 95% CI 0.57 to 1.83; p<0.001), resting heart rate (SMD −0.33, 95% CI −0.56 to −0.09; p<0.01), systolic blood pressure (SMD −0.35, 95% CI −0.60 to −0.09; p<0.01) and DBP (SMD −0.38, 95% CI −0.65 to −0.10; p<0.01) in overweight/obese populations.
Why this rating
Based on a systematic review and meta-analysis of 65 intervention studies.
Source
Effects of high-intensity interval training on cardiometabolic health: a systematic review and meta-analysis of intervention studies
Romeo Batacan et al. · British Journal of Sports Medicine · 2016
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