Obesity is defined as an accumulation of excess body fat that presents a risk to one's health. The most common method to determine if someone is obese is by calculating their body mass index (BMI). A BMI of 30 or higher is considered obese. Obesity occurs when a person's energy intake from food and drink exceeds the energy expended through normal bodily functions and physical activity over an extended period of time. This causes the body to store excess calories as body fat. There are many complex factors that influence the development of obesity, including:
- Genetics - some people inherit a predisposition to gain weight more easily
- Lifestyle factors - lack of physical activity, poor diet, excessive alcohol intake, lack of sleep, high stress levels
- Medical conditions - hormone imbalances, injuries/disabilities limiting mobility, certain medications that increase appetite/weight gain
- Socioeconomic factors - lack of access to healthy foods, safe areas for exercise
- Cardiovascular disease
- Type 2 diabetes
- Certain cancers
- Osteoarthritis
- Sleep apnea
- Increasing physical activity
- Eating more vegetables, fruits, and whole grains
- Monitoring portion sizes
- Reducing processed/high-calorie foods and sugary drinks