You need to burn 3,500 calories to lose 1 pound, so with three one-hour Zumba sessions a week, you should lose at least 1 pound
in a little over two weeks or almost 2 pounds a month. If you dance Zumba for one hour a day and eat 500 calories a day less than you need to maintain your weight, you should lose 2 pounds weekly or 8 pounds a month. This is a fast, but healthy rate of weight loss. Losing weight any faster means you're losing muscle instead of fat.