The Student Room Group
It depends on how much fat a person has on their body. Muscle weighs more than fat, so they may have had more fat than muscle... But I don't know the scientific reasons....
Reply 2
Or height, or just simply body frame. A person with a lot of fat on small bones would look bigger than a robust person with the same weight.
Reply 3
If your BMI is over 25 then yes, thats an indication that your overweight but dont rely on it. However, get your body fat tested and lean muscle percentage done and if your body fat is more than about 25% it might help to reduce it.

More lean tissue the better normally but not sure of good proportions.