Cleaning house is work that burns calories. Cleaning is physical activity but most people wouldn't call it exercise.  "Activity" is classified as either exercise, performed to enhance physical fitness, or work that done to keep ourselves alive. And like exercise, some cleaning jobs are more intense than others and so burn more calories. For instance cleaning that involves moving furniture burns more calories than dusting. Most cleaning is not usually intense enough to deliver a cardio-workout, but all movement is good. See how many calories you burn in cleaning at Calorie Count.