– Mean and 95% confidence interval of measurements: A) Perceived stress scale, 14 items – PSS-14; B) Freiburg Mindfulness Inventory - Brazil – FMI-Br; C) Minnesota living with heart failure questionnaire – MLHFQ; D) Pittsburgh sleep quality index – PSQI; E) 6-minute walk test – T6MC; F) Cortisol, all concerning cross-group behavior and time (p-value within the frame for I: Interaction, G: Group, T: Time) and with a p-value of the in post-hoc results < 0.05 via Bonferroni on the brackets. All the variables were measured in points of the respective scale scores, except for functional capacity and cortisol, measured in meters and mcg/dL, respectively.