Figure 2From: The influence of body mass index and outdoor temperature on the autonomic response to eating in healthy young Japanese womenChanges in the low-to-high frequency ratio before and after lunch. (a) High and (b) low BMI groups. Values are expressed as the mean ± standard error. P value was calculated using the Friedman test. The Wilcoxon signed-rank test was used to compare heart rate variability (before vs. after lunch, **P < 0.01).Back to article page