One of the first exercises I did when I started CrossFit was this move called an AbMat sit-up, named after the mat you place under your lower back for support. I couldn't believe how sore I was for ...

Strengthening your lower abs might not be at the top of your priorities when building a stronger core. Maybe you’re focused on how core strength can improve other exercise areas, like weightlifting or ...

When you buy through links on our articles, Future and its syndication partners may earn a commission. Credit: Getty Images Bored of planks and crunches? Why not try mixing things up with a killer ab ...

Refreshing your workouts prevents boredom and training plateaus, but you don’t always need to program brand-new exercises to stay in the game. Sometimes you can just as effectively switch up your ...

The sit-up has been a staple exercise for as long as most people can remember, from health clubs to military physical fitness tests. But many experts say it can lead to back injuries. Photo: Getty For ...