Flutter kicks deserve some long-overdue credit. The exercise isn't just for ab-sculpting, despite its reputation. Yes, your abs are working hard, but so much more is going on that doesn't get talked ...

Here's what happened when this writer did flutter kicks for a week ...

Crunches and sit-ups aren't the only way to build strong abs. Underrated exercises like planks and flutter kicks are effective, low-impact alternatives. Doing different core exercises also helps add ...

Core training has always been part of military PT and fitness testing. From crunches to sit-ups, flutter kicks, leg tucks and plank poses, the U.S. military uses many exercises to test core strength.