What Is It?
A person is classed as being overweight or obese if they are carrying excessive amounts of body fat. This is usually defined using the Body Mass Index (BMI): a person with a BMI of 20-25 is classed as healthy, a person with a BMI of 25-29.9 classed as overweight, and a score of 30 or more categorises you as obese.
There is usually a lot of discussion about the validity of using the BMI as it is only a general guide (it fails to accurately those who are athletic, or elderly). One thing is for sure, if your score exceeds 30 then you are carrying too much weight. Over 60% of the adult population in Australia are either overweight or obese.

Why Should You Care?
Those who are overweight or obese are more likely to get type 2 diabetes, heart disease, kidney disease, sleep apnea, and cancer. They will also be more prone to joint injuries, and skin problems.
Carrying excessive amounts of weight can also reduce your quality of life as you will lack motivation and energy.

What Can You Do?
The most obvious answer is to lose weight, and that can be done by following a calorie controlled diet, and increasing activity levels.