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.