An analysis of %E for the three WHtR quartile ranges revealed a clear trend, with Q1 showing a slight tendency to underestimate VO 2 max and Q4 showing a strong tendency to overestimate VO 2 max for both sexes.
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For the Q4 subset, the measured versus estimated VO 2 max relationship remained highly significant (r=0.93 and r=0.90 for men and women, respectively) ( Figure 1 ).