BMI (body mass index), which is based on the height and weight of a person, is an inaccurate measure of body fat content and does not take into account muscle mass, bone density, overall body composition, and racial and sex differences, say researchers from the Perelman School of Medicine, University of Pennsylvania.
Bodies come in all shapes and sizes. Shutterstockwhich means it misses the difference between muscle mass and fat.
BMI is not an accurate measure of health. Here's why
Consider going to your doctor and getting blood tests done to evaluate your health. And yet on every level that we look at, their health is actually quite good.
Their cholesterol and blood pressure are excellent. Their blood sugar is excellent. They don't seem to have any health effects associated with their excess weight.
Older people who are slightly overweight may live longer. Richard Atkinson, a researcher and editor of the International Journal of Obesity, told that older people who are slightly overweight tend to live longer than leaner elderly people, though the reasons for that are unknown. They're also less likely to have fat concentrated in the belly area.