Thanks to a new design of shopping cart, customers of Tesco will soon be able to burn calories while buying the weekly groceries.
Using technology normally found on gym machines, the trolley can be programmed to make it harder to push, increasing the heartbeat and exercising muscles in the legs, arms and stomach.
Sensors in the handle bar allow shoppers to monitor their heart rate and count calories as well as measuring how far they have traipsed up and down the aisles.
Wayne Asher, who designed the trolley on behalf of the German manufacturer Wanzl, claims a 40-minute shopping trip with the trolley set at resistance level seven (it goes from one to 10) would burn off about 280 calories.
That is equivalent to half an hour jogging, he said, and 30 per cent more than the number of calories expended shopping with a standard trolley.