There are people who appear to remain slim almost magically, no matter what they eat and whether they formally exercise or not. Janaki Bahri, the 29-year-old mother of a boy who just celebrated his first birthday, is one of those people. She has always been slim and petite and returned to her pre-pregnancy size within six months of the baby’s birth.

Bahri is an active person but is not someone who works out regularly. She says that she has not worked out in over a year and a half and didn’t have to exercise to lose her pregnancy weight. If you ask her how she remains slim, her instinctive reply is: �It’s genetic; my father is exactly the same way.�

Meanwhile, urban India is putting on more weight now than ever before because we are putting more energy into our bodies than we are using up, consistently. Lancet published a paper in November 2010 that looked at the growing health concern of obesity in developing nations like India, Brazil and China. The study was led by Daniel Chisholm and his colleagues at the health division of the Organisation for Economic Co-operation and Development (OECD) and found that dietary habits and a sedentary way of life were causing an energy surplus in our bodies and fuelling the obesity epidemic. Read More

Sujata Kelkar Shetty, PhD, writes on public health issues and is a research scientist trained at the National Institutes of Health in Bethesda, US.