Objective: To evaluate the feasibility and efficacy of the ‘Healthy Dads, Healthy Kids’ (HDHK) program, which was designed to
help overweight fathers lose weight and be a role model of positive health behaviors for their children.
Design: Randomized controlled trial.
Participants: A total of 53 overweight/obese men (mean (s.d.) age¼40.6 (7.1) years; body mass index (BMI)¼33.2 (3.9)) and
their primary school-aged children (n¼71, 54% boys; mean (s.d.) age¼8.2 (2.0) years) were randomly assigned (family unit)
to either (i) the HDHK program (n¼27 fathers, n¼39 children) or (ii) a wait-list control group (n¼26 fathers, n¼32 children).
Intervention: Fathers in the 3-month program attended eight face-to-face education sessions. Children attended three of these
Outcomes: The primary outcome was fathers’ weight. Fathers and their children were assessed at baseline, and at 3- and
6-month follow-up, for weight, waist circumference, BMI, blood pressure, resting heart rate (RHR), objectively measured
physical activity and self-reported dietary intake.
Results: Intention-to-treat analysis revealed significant between-group differences at 6 months for weight loss (Po0.001), with
HDHK fathers losing more weight (7.6 kg; 95% confidence interval (CI) 9.2, 6.0; d¼0.54) than control group fathers (0.0 kg;
95% CI 1.4, 1.6). Significant treatment effects (Po0.05) were also found for waist circumference (d¼0.62), BMI (d¼0.53),
systolic blood pressure (d¼0.92), RHR (d¼0.66) and physical activity (d¼0.91), but not for dietary intake. In children, significant
treatment effects (Po0.05) were found for physical activity (d¼0.74), RHR (d¼0.51) and dietary intake (d¼0.84).
Conclusion: The HDHK program resulted in significant weight loss and improved health-related outcomes in fathers and
improved eating and physical activity among children. Targeting fathers is a novel and efficacious approach to improving health
behavior in their children.