The term "obesity" refers to an excess of fat. However, the methods used to directly measure body fat are not available in daily practice for your local Personal Trainer Sydney CBD. For this reason, obesity usually is assessed by the relationship between weight and height (ie, anthropometrics), which provides an estimate of body fat that is sufficiently accurate for clinical purposes.
The body mass index (BMI) is the accepted standard measure of overweight and obesity for children two years of age and older. BMI provides a guideline for weight in relation to height and is equal to the body weight (in kilograms) divided by the height (in meters) squared.
Adults with a BMI between 25 and 30 kg/m2 are considered overweight; those with a BMI ≥30 kg/m2 are considered to be obese. Obesity in adults is subcategorized as class I (BMI ≥30 to 35), class II (BMI ≥35 to 40), and class III (BMI ≥40). Because children grow in height as well as weight, the norms for BMI in children vary with age and sex. If you find yourself overweight or obese, a personal trainer in the Sydney CBD might be able to help.