The average American . . .

Eats three hamburgers a week. (As a nation, that amounts to a staggering - tottering? - 40 billion burgers annually.)

And 7.1 pounds of peanuts a year.

And spends around $2.5 billion a year on crisps.

Has a diet of which at least 50 per cent is carbohydrates.

And One in four American admits to being completely sedentary.

Forty per cent of them acknowledge that they rarely exercise.