How Many Calories Do You Burn Doing 100 Crunches? The number of calories burned doing 100 crunches is small; the movement of crunches is so minimal that people don't burn many calories doing them. While crunches are effective for strengthening muscles, they are not cardiovascular exercises, which burn the most calories.
Crunches strengthen your abdominal muscles — specifically the superficial rectus abdominis according to ExRx.net — which forms the front "six-pack," and the obliques, located at the sides of your waist. Exactly how many calories you burn during a set of crunches depends on your size, time spent crunching and intensity.
Slow down there, Hercules! After 300 crunches, you might feel the burn in your abdominal muscles — but you probably haven't burned that many calories. The sad news is that crunches just aren't a big calorie-burner, particularly when compared to other physical activity. However, if you're looking ...
200 crunches burn about 10 calories, so if you divide 10 by 200 you find that one crunch would burn 0.05 callories. You actually burn 50 calories doing 100 crunches, so 200 would burn 100 calories
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I'm not sure how many calories crunches burn but there are different ways to do them that make them harder. Try sitting indian style, then lay down with your legs still crossed. Then do crunches like that. I run 5-6 miles and day and am in great shape and I can barely do 40 of them that way.
The simplest way to burn 100 calories fast is to run. And you don't have to be a marathoner or a speed freak to blast away fat. Run a 10-minute mile for 10 minutes to burn 100 calories. If you're not ready to run for a full mile, try to do run/walk intervals to build stamina and still burn fat.
But at least cardio is better than crunches. Kind of. Remember that Men’s Health says it takes 22,000 crunches to lose a pound. One pound of fat contains 3,500 calories, so one crunch burns just 0.159 calories. If you do 20 crunches in a minute, that’s 3 calories per minute from crunches. No wonder crunches are a WASTE of time.