Your stool appears to be lumpy sausage-shaped, a very dark brown color, and slightly fragmented with somewhat blurred edges. Considering your very active lifestyle and low-FODMAP diet, this could indicate a healthy bowel habit, but your heavy drinking warrants attention. Maintaining healthy eating habits is important for achieving your weight gain goal.

You are experiencing diarrhea with very dark brown stool. Consider increasing fluid intake and reducing fiber. It would also be advisable to review your drinking habits.