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Meta-Analysis
. 2019 Jan 28;14(1):e0210644.
doi: 10.1371/journal.pone.0210644. eCollection 2019.

Effects of HIIT and MICT on cardiovascular risk factors in adults with overweight and/or obesity: A meta-analysis

LiQiang Su  1 , JinMei Fu  2 , ShunLi Sun  2 , GuangGao Zhao  3 , Wei Cheng  4 , ChuanChuan Dou  5 , MingHui Quan  6
Affiliations
Meta-Analysis

Effects of HIIT and MICT on cardiovascular risk factors in adults with overweight and/or obesity: A meta-analysis

LiQiang Su et al. PLoS One. .

Abstract

Objective: The purpose of this study was to evaluate the effects of high-intensity interval training (HIIT) and moderate-intensity continuous training (MICT) on cardiovascular disease (CVD) risk factors in adults with overweight and obesity.

Methods: Twenty-two articles were included by searching six databases, the total number of subjects was 620 in these articles. Outcomes were synthesised using a random-effects meta-analysis of the Standardized mean difference (SMD) in CVD risk factors.

Results: HIIT and MICT resulted in statistically significant reductions in Weight, BMI, fat%, total cholesterol(TC), and improvement in VO2max. Compared with MICT, subgroup of durations of HIIT training interval ≥2 min can significantly increase VO2max (SMD = 0.444, 95% CI:0.037~0.851,P = 0.032), subgroup of energy expenditure of HIIT equal to MICT can significantly increase VO2max (SMD = 0.399, 95% CI:0.106~0.692,P = 0.008).

Conclusions: HIIT appears to provide similar benefits to MICT for improving body composition, VO2maxand TC, but HIIT spent less time than MICT by 9.7 min on one session. HIIT is superior to MICT in improving cardiopulmonary fitness when durations of HIIT training interval ≥2 min or energy expenditure of HIIT same as MICT. PROSPERO ID: CRD42016045835.

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Conflict of interest statement

The authors have declared that no competing interests exist.

Figures

Fig 1
Fig 1. Study selection process.
Fig 2
Fig 2. Meta-analysis for the comparison of HIIT vs. MICT for VO2max with subgroup analyses for studies employing DHTI < 2 min, DHTI ≥2 min than MICT.
The positive value of X axis indicated that HIIT was more effective than MICT in improving VO2max. Lunt et al.-1 and Lunt et al.-2 were two different HIIT methods were used in one article. Martins et al.-1 and Martins et al.-2 were two different HIIT methods were used in one article. DHTI< 2 min: HIIT training interval < 2 min, DHTI ≥2 min: HIIT training interval ≥ 2 min.
Fig 3
Fig 3. Meta-analysis for the comparison of HIIT vs. MICT for VO2max with subgroup analyses for studies employing H = M, H<M and ? than MICT.
The positive value of X axis indicated that HIIT was more effective than MICT in improving VO2max. Lunt et al.-1 and Lunt et al.-2 were two different HIIT methods were used in one article. Martins et al.-1 and Martins et al.-2 were two different HIIT methods were used in one article. H = M: Energy expenditure of HIIT equal to MICT;H<M: Energy expenditure of HIIT less than MICT; ?:Not mentioned in the article and the results can not be used to calculate the energy consumption.
See this image and copyright information in PMC

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