No, you don't have to work off every morsel you eat, but before you make a mindless late night trip to the freezer for some ice cream, consider how much effort it would take to cancel out those calories. In the video above, part of the 'You Ate It? Negate It!' series, Erin Lovelace demonstrates the activities, like snowboarding and basketball, you would need to do torch the 500 calories in a standard three-scoop ice cream sundae, plus she shares some tips for healthier swaps so you can still satisfy your sweet tooth without all the added calories.