How many crunches can you do — and how does that stack up with others your age? That was the question posed by "FOX & Friends" on Monday, when fitness expert Joseph David challenged hosts Brian ...

Crunches are another enduring bodyweight exercise. Here's what the exercise is, which muscles it works and why crunches are so good for overall health. Crunches are a popular abdominal ...

Crunches are the ab exercise you need to add into your regular workout to improve your core strength, a fitness trainer suggests. Joseph David, a New York City based trainer, claims that core ...

This week: butterfly crunches. A great example is the butterfly crunches, which turn the ab-burning dial up on the traditional exercise to keep challenging you and your core. You’re now ...

The main difference between sit-ups and crunches is the range of motion involved in each exercise. Sit-ups require you to lift all the way up, while crunches require a slight lift off the ground.