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How Many Calories Do You Burn Doing Crunches?

Last updated: May 23, 2022

Crunches are a popular exercise because they work on the abdominal muscles. And oftentimes, if someone is looking to achieve a "beach body," this is one exercise they may choose. However, are crunches all they're cracked up to be? In this piece, we'll discuss the following:

Crunches Vs Situps

Both a crunch and a situp are working your core muscles. However, they differ because a situp works a wider range of muscles, while a crunch focuses on working only the core. With a situp, you lay with your knees bent and feet flat on the floor. You start with your back flat on the floor and you sit up all the way. With a crunch, you start in the same position but only come up partially. Some people will alter this exercise by leaning to the right and then leaning to the left to target more muscles. 

Although both crunches and situps are pelvic fracture recovery exercises, situps work the following muscles: 

  • Rectus abdominis 
  • External obliques
  • Internal obliques
  • Rectus femoris 
  • Iliopsoas

While crunches work some of the same muscles, they don't work as many. The ones they do work include rectus abdominous, internal obliques, and external obliques. 

Both a crunch and a situp are working your core muscles. However, they differ because a situp works a wider range of muscles, while a crunch focuses on working only the core. With a situp, you lay with your knees bent and feet flat on the floor. You start with your back flat on the floor and you sit up all the way. With a crunch, you start in the same position but only come up partially. Some people will alter this exercise by leaning to the right and then leaning to the left to target more muscles. 

How Many Calories Do Crunches Burn?

If you're looking to lose weight in addition to getting a flat stomach, you may wonder how many calories do crunches burn, especially compared to other pelvic fracture recovery exercises. 

There isn't a set number of calories burnt each time you do a crunch. It depends on various factors, such as your went, height, age, and the intensity of the crunch. It also depends on how long you're doing this exercise. 

As a general rule, though, a person weighing between 125 and 185 pounds will burn between 45 and 66 calories per 10 minutes as they're doing crunches. If a person in that same weight category was doing moderate-intensity crunches, they'd burn between 80 and 118 calories per 10 minutes.  

However, if you'd like a more accurate estimate of how many calories do crunches burn for a person of your size, you'd use the following formula to calculate it: MET × 3.5 × your weight. Make sure you plug in your weight in kilograms. To convert from pounds to kilograms, divide your weight in pounds by 2.2. In this equation, MET stands for the metabolic equivalent. This number represents the intensity of the activity and is a ratio that compares the working metabolic rate of an exercise compared to the resting metabolic rate. 

How Many Calories Do Situps Burn?

When you're comparing pelvic fracture recovery exercises, you may want to know the answer to "How many calories do situps burn?" There isn't a straightforward answer to this question. It varies from person to person and entails factors, such as the intensity, as well as your height, gender, weight, and age. For instance, as a general rule, the amount of calories you burn is higher when you weigh more, and the number of calories you burn decreases as you age. 

Typically, you burn about one calorie per situp, but you can find an exact figure by using the equation above and inputting four to six for the METs into the aforementioned equation. 

How Many Crunches a Day? How Many Situps?

If you're looking for the ideal number of crunches to do, it's based on your goals and stamina. However, in general, doing 25 to 30 crunches per day will provide you with adequate benefits. 

Keep in mind that you can start out much lower than that and build up to that number. And if you're comfortable with that amount, you can continue to increase the number to further enhance your workout. Just make sure you're listening to your body. If you're in pain or are suffering from soreness or a limited range of motion after crunches, ease off. 

For situps, you should do 10 to 25 repetitions per set. You may be able to do three or four sets, but that depends on your stamina. Never push yourself and do more than comfortable. And keep in mind that you may spread those reps out throughout the day. 

FAQs 

While you can compare pelvic fracture recovery exercises based on how many calories they burn, it helps to know some generalized information about crunches to figure out if they're for you. Here are some of the most frequently asked questions about crunches:

Are crunches good?

Generally speaking, crunches are a good exercise to work your abdominal muscles. Plus, they're known to improve your posture at the same time. They, however, don't burn a lot of calories if you're more focused on weight loss than toning your abs. 

Fortunately, they don't require any equipment. You can do them from your own home or a hotel room when you travel. 

Are crunches cardio?

Crunches are actually classified as an anaerobic exercise rather than an aerobic exercise. They're specifically geared toward muscle building and toning as opposed to calorie burning. However, they can be a part of a well-balanced exercise plan that consists of cardio and resistance training. 

Can I do crunches everyday?

You can do crunches every day if you really want to. Just don't overdo it. Do fewer reps and sets than you would if you were to workout every other day. 

If you wanted to perform them like any other anaerobic exercise, you should give yourself a day off after every day you do them. In other words, you should do them either three or four times per week. 

Can I do crunches while pregnant?

As a general rule, you should avoid doing crunches or situps once you get into your second trimester. Try yoga poses that work your abs. A trainer or obstetrician will be able to educate you on safe abdominal exercises to do while you're pregnant. 


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