There is no definitive answer to this question as the number of calories burned when you are sore will vary depending on a number of factors, including your weight, intensity of the soreness and how long you have been sore for. However, as a general guide, it is estimated that you may burn up to 3-5% more calories when you are sore compared to when you are not. This means that if you normally burn 2,000 calories in a day, you could potentially burn up to 100 extra calories when you are feeling sore. While this may not seem like a lot, over time it can add up and help contribute to weight loss or maintenance.