Socially Responsible Packaging Research
Part1
Obesity is a condition of excess body fat. In general, body fat accumulates when the
energy intake from food and drink is greater than the energy expended through physical
activity over an extended period of time. While excess body fat can have a genetic or
medical basis, these factors cannot explain the rapid increase in population prevalence of
obesity.
Causes of obesity
• Increasing energy intake
• Increasingly sedentary lifestyles
• Decreased walking, cycling and transport-related physical activity
• Changes in family structures and dynamics
How is obesity measured?
Obesity is most commonly measured using the body mass index (BMI). BMI is a weight-to-height ratio, and is considered to be a reasonable reflection of body fat for most people. BMI is calculated by dividing bodyweight in kilograms by the square of height in metres (kg/m2).
Obesity in Australia
In 2007-08, a higher proportion of males aged 18 years and over were overweight or obese (63%) than were females (48%). These overweight/obesity rates were both up five percentage points on the 2001 results. These estimates are based on people's self reported height and weight.
Initial Concept 1&2






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