You can increase the challenge by doing sit-ups and crunches on a decline bench, but you need to know what you're working so you can make the best choice.

While old-fashioned crunches are what I consider a good "finisher" at the end of your core training, poor form often results in not much else than a sore neck.

The best ab exercises to do at home without gym equipment. If you want six-pack abs you need a great ab training program.

Nicky Hollender and Simple. Healthy. Fitness. are back with the 5-minute ab challenge. Try these exercises to get your tummy toned and ready to hit the beach!

While only a healthy diet can unearth your abs, these exercises will help you get rid of your muffin top and build a tight, toned core.

Hollowing, bracing and pelvic tilts are three abdominal maneuvers you can do safely behind the wheel.

Mixing up your workouts is one of the best ways to stay motivated, so here are four ab exercises you've probably never heard of to keep things interesting.

Don't waste time at work when you could be exercising. Fit in a few abdominal exercises to help strengthen your middle and improve back health.

Think you’re hardcore -- or that you have a hard core? Prove it! These 41 midsection-mangling moves are some of the most advanced on the planet.

A Swiss ball is one of the most versatile pieces of fitness equipment out there. You’ve probably seen people stretching or performing sit-ups on these big, squishy rubber balls, but there’s so much more you can do with one. (No, we’re not talking about using it as a giant clown nose.

Could your posture use a boost? If you sit at a desk all day, the answer is likely a resounding yes. Try these core exercises and complementary stretches.

It's not always possible to work out on the floor, but there are plenty of effective and challenging ab-strengthening exercises you can do while standing. Here are five of the best.