How many calories can you burn doing 100 sit ups?

Doing 100 sit-ups will not burn a significant number of calories. The exact amount burned depends on various factors such as your weight, age, gender, and the intensity of the exercise. On average, doing 100 sit-ups may burn around 25 to 50 calories for an individual weighing around 150 pounds.

However, it's important to note that spot reduction (focusing on burning fat from a specific area) is not possible through exercises like sit-ups alone. To reduce overall body fat and improve fitness, a combination of a balanced diet and regular full-body exercise is necessary.