The calorie burn for 100 sit-ups depends on factors such as your weight and how fast you do the sit-ups. This form of calisthenics, like other strength-training exercises that rely on your body weight, results primarily in stronger muscles, particularly the rectus abdominis, rather than the calorie burn that cardiovascular exercise provides.
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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.
If you do incline sit-ups rather than regular sit-ups, you’ll burn 24 calories if you complete 100 sit-ups in five minutes. V sit-ups burn 30 calories, and medicine ball V sit-ups or Roman chair sit-ups burn 34 calories in five minutes.
Sit-ups compare to other forms of calisthenics such as push-ups in terms of energy expenditure, notes the online site NutriStrategy. Five minutes equates to 17 calories burned for someone weighing 130 pounds, 20 calories for someone weighing 155 pounds, 24 calories for an 180-pound person and 27 calories for someone weighing 205 pounds.