Overweight: Your BMI exceeds the ‘recommended’ number.
Even if the additional body-weight is caused by fat, it isn’t so bad.
Also; The additional weight could be muscles as well.
Obese: A definition of a person who’s weighing a lot more than recommended, and most likely by fat. This is the area, where the additional weight is getting unhealthy.
Obesity” and “overweight” are terms that come from how we’ve, as a society, chosen to use a calculation created by Lambert Adolphe Jacques Quetelet, a Belgian astronomer and statistician. Quetelet never intended for his mathematical equation to be used to determine health, however.
In 1998, the CDC in the US decided that “overweight” wasn’t being defined as well as it could be, and a panel comprised of people from this government body (some of whom had financial interests in the weight loss industry) decided to lower the BMI that equals “overweight” from 27.5 to 25, thereby making millions of Americans “overweight” in one fell swoop.
It is a difference in degree. People with a Body Mass Index value between 25 and 29.9 are considered overweight. Those above 30 are classified as obese. Note, however, that what really counts here in terms of negative impact on your health is the body composition. As the BMI formula only uses height and weight, the use of BMI alone could describe a fit bodybuilder as ‘obese’, which is certainly not the case. When we talk about being overweight or obese, we obviously refer to the excess of fat tissue in the body.