Below are some working definitions of terminology used in this section.

Obese – someone who is very overweight, with a lot of body fat. The most widely used
method of measuring obesity is body mass index (BMI), which is a measure of whether a
person is a healthy weight for their height. BMI is calculated by dividing someone’s weight (in
kilograms) by their height (in metres) squared.

Physical activity – any body movement that works a person’s muscles and requires more
energy than resting. Walking, running, dancing, swimming, housework and gardening are all
examples of types of physical activity.

Physical inactivity – a term to describe people who do not get the minimum recommended
amount of regular physical activity. For adults, a person who does less than 30 minutes of
physical activity per week is defined as inactive.

Sedentary – refers to sitting down, a person tending to spend a lot of time sitting down, or a
way of life characterised by a lot of time spent sitting down.