BMI over 23 already counts as overweight in South Asia: why obesity is rising and how to control it

In general, a BMI above 25 is considered overweight and above 30 is obesity. For residents of South Asia, however, the threshold is lower: a BMI above 23 already counts as overweight.

The biggest cause of obesity is taking in excess calories combined with too little physical exertion. When more calories are consumed as food than are burned through activity or exercise, the surplus is stored in the body and produces obesity. Eating high-calorie food without matching physical exertion is identified as one of the main causes.

Genetic, metabolic or hormonal problems can also cause obesity, though in most cases overeating and too little physical activity are responsible.

Sleep is directly linked to weight control. Sleeping less than five to six hours a night increases the release of the hunger hormone and reduces leptin, which increases appetite and weight. Insufficient sleep also makes the body produce extra cortisol, which obstructs weight loss.

Excessive worry or mental stress is also cited as responsible for obesity.

Childhood obesity has now become a matter of concern: a lack of games or physical exertion, eating more fast food and sleeping less are causing obesity to rise quickly among children.

The first step to control is changing eating habits: reduce sugar in food and eat more protein, vegetables, fibre and healthy fats, while giving up fast food, oily and fatty food and excess-calorie food.

Lifestyle must also change, with regular physical exertion and exercise made part of the daily routine.

Adequate sleep is also a condition of weight control: sleep seven to eight hours at night and reduce sleeping during the day.