1 tablespoon of mayonnaise: 110 calories
Walking: 28 minutes
Biking: 16 minutes
Running: 12 minutes
So when you think about it, if you eat five sandwiches a week with a tablespoon of mayo each, that's 550 calories! And if you have to walk almost a half hour extra a day to burn it off, doesn't mustard look — and taste — better right about now?
Source: Diet Detective