Join LIVESTRONG's 4-week Plank Challenge to get flat abs in time for summer. We'll show you how you can work toward a stronger, healthier and sexier you without any equipment!

Aside from just building chiseled abs, strengthening your core with planks will help prevent back injuries and improve your posture.

Read on for the best 12 no-crunch core exercises. They'll train your entire midsection, prepare you for movement, and yes, give you the foundation for a carved set of abs.

From the chiseled six-pack of Sam Heughan to the tight and toned core of Julianne Hough, these Hollywood fitness buffs know a thing or two about how to get and stay in shape year round.

Welcome to Week 2 of the 4-Week Plank Challenge! This week, it's all about getting killer abs in your office attire.

You've made it to the final week of our 4-Week Plank Challenge for a seriously stronger core — but you're not done yet.

It’s Week 3 of the 4-Week Plank Challenge, so hold each variation for at least a minute to show your progress!

Kick off the first week of the LIVESTRONG 4-Week Plank challenge with these seven variations to strengthen and tone your core.

Strong abs not only look great, they also help you perform better at sports, lift more weight in the gym, maintain good posture and even prevent back pain. So how do you get them without endless crunches?

Eight pack abs require extremely low body fat, lean muscle, and well-defined abs. Here's how to diet down and reveal your eight pack abs.

A healthy diet and regular exercise will help you burn calories and total body fat for a flatter lower tummy.

A v-cut stomach requires two components: A low body-fat and well-developed, muscular abs. Here's how to reveal a v-cut stomach.