71576This summer, photos surfaced of Leonardo DiCaprio wearing board shorts with a flabby gut hanging over the top. The Internet dubbed his soft silhouette a “dad bod.” Though DiCaprio isn’t actually a father, and seems to have no problem attracting the ladies, dad bods are a real problem for many men. Fathers experience a 3- to 5-pound weight gain and an increase in body mass index after their little ones are born, according to a new study from the American Journal of Men’s Health. Modal Trigger “The more weight the fathers gain, the greater risk they have for developing heart disease, diabetes and cancer,” the study reads. The Post found five hardworking dads and challenged them to lose the papa paunch over six weeks. Rob Fletcher, a fitness vet and author of “Transformation America: Choose To Live Positive, Healthy, Fit, Confident and Strong!,” was enlisted to whip the dads into shape. He led workouts focused on losing fat and building lean muscle — not just weight loss. His philosophy: “Take control. Take action. Be accountable.” Nutritionist Danielle Pashko, author of “Smile at Your Challenges,” consulted with each dad in person and fashioned a personal food plan. Check out how these guys went from flab to fab!