One hundred years ago today Alfred Wegener presented his Continental Drift hypothesis to much derision and scepticism. Alfred Wegener first thought of this idea by noticing that the different large landmasses of the Earth almost fit together like a jigsaw.
BMI readings under 18.5 mean you are underweight, and could put on a few pounds. If you fall between 18.5 and 24.9, youâre considered normal, while a BMI of 30 or higher qualifies as overweight. But in recent years, more researchers argue that itâs not the most accurate way to measure body weight. For years, scientists have said that BMI canât distinguish between fat and muscle, which tends to be heavier and can tip more toned individuals into overweight status, even if their fat levels are low.
Body mass index (BMI) is measure of body fat based on height and weight. The higher the BMI, the greater the risk of some diseases, including high blood pressure, coronary artery disease, stroke, osteoarthritis, some cancers, and type 2 diabetes. A BMI between 25 and 29.9 is considered overweight. 2  A BMI of 30 and above is considered obese. 3  It may overestimate body fat in athletes and others who have a muscular build. 4  It may underestimate body fat in older persons and others who have lost muscle mass.