Associations between changes in sleep quality (a) and sleep duration (b) with changes in morphological variables in response to the diet intervention. The relationship was statistically significant at *P<0.05 and **P<0.01. P values are for the relationship between tertiles of change in sleeping habits and anthropometric markers. Values are expressed as least squares means. The associations between tertiles of change in sleeping habits and anthropometric markers were performed using analysis of variance adjusting for age, sex and baseline body mass index. A Tukey post hoc test was performed to determine which groups were significantly different.