Why Is There An Obesity Epidemic?

The biggest single cause is sedentary lifestyles.  Calorie intake -- how much people eat on average -- has actually been on a steady decline since the 1950s.  But activity levels have changed enormously.

Most men in the 1950s had manual/active jobs.  Most women did not work, but looking after family and home was itself quite a labour-intensive chore. In the 1950s people still washed a most clothes and linens by hand and vacuum cleaners didn't exist.  Getting around was a more physical experience, too, at least you walked as far as the bus stop and not just to the garage.

The other big factor in obesity is diet-related.  As a proportion of the total diet, we eat a lot more sugar and high carbohydrate foods (eg, bread, crisps, even milk).  These don't satisfy hunger the way vegetables or meat do.  Not only that, but we have the habit of reaching for "treat" type foods, that are inexpensive and (again) too high in sugar.  Moreover, we drink more of our calories (fizzy drinks, juices) now than we used to.  These are also easily absorbed but not very satisfying.  

The 24-hour lifestyle also play a part, as it upsets the hormonal balance telling us when we've eaten enough (read more).

An obesity epidemic has been caused by a lack of movement and exercise, by stress and fast eating / fast food without the necessary movement to work off the extra weight and calories.

We live in a fast paced society and we spend a lot of time and money in drive thru lines. This, coupled with the fact that we exercise less, would be indicative of an obesity epidemic.

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