As a fitness expert with a background in sports science, I can provide you with an informed answer regarding the caloric expenditure of performing a sit-up. The number of calories burned during a sit-up can vary based on several factors, including the individual's body weight, the intensity of the exercise, and the specific technique used.

On average, a person weighing about 150 pounds (68 kg) might burn around 3.5 calories per minute while doing sit-ups. Since a typical sit-up can take about 3 seconds to complete, doing one sit-up would result in a very small caloric expenditure, approximately 0.05 to 0.1 calories, considering the time taken for one repetition.

It's important to note that while sit-ups can help strengthen the abdominal muscles, they are not the most efficient exercise for burning a significant amount of calories. For more effective calorie burning, consider incorporating cardio exercises and full-body strength training into your fitness routine.

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If you weigh 150 pounds and do 100 sit-ups in 10 minutes, you'll burn 57 calories. If you do the sit-ups in five minutes, you'll burn 28 calories, according to the online fitness site FitClick.read more >>