Hempy I was the same years back - 6'3" 98kg and rowing in the Olympic training squad for Atlanta. Went to the doctor for my first Class 1 medical and was told I was overweight.
My regular GP and the trainers had me on a special diet at the time as I was down to < 4% body fat and they wanted to see me "fat up" a bit more as they were scared I was going anorexic.
BMI my arse.