Core Work

A look at all the muscles that make up your core and how you can start to strengthen them.

Sit-ups are one of the least effective ways to strengthen the core.

In addition to being straight-up impressive, this one exercise will help you move and run more efficiently.

The benefits of building core strength go beyond the abs.

Forget six-pack abs. Build a rock-solid core tailored to the demands of running.

Strength training is key for runners of all types. Try these exercises to get started and be ready to tackle any terrain.

Ward off injury on your way to a PR with this streamlined, 10-minute circuit.

Check out Nicole Radziszewski's author page.

After months with a sore back, one runner started doing a plank every day. Here's how it eliminated her pain and helped her form.

Squeeze the sides of your abs with this dynamic move, that will also give you a good full body stretch.

Think those lower abs are too hard to tone? Think again!

This move works your abs and obliques—and is a great way to test where you currently are with core strength.

If you want to add a bit of a challenge to your core routine, there's one small piece of equipment you need to get.

Roll out, roll out—but really, it helps you sleep better at night.

The key to running with power is developing a rock-solid core.

The ninth and final move from our April Ab Challenge is here!

This standing ab move is so basic, but it provides a big payoff.

These sliding moves challenge your core to up its functional strength—a perfect workout for runners to do during strength training.

You made it to April, now try the second move in our nine-part April ab challenge: side planks.

Cardio is king when it comes to melting fat but don't skimp on the core work.

Say what?!? Find out why having a six pack won't make you any faster.

That burn during crunches doesn't mean you are getting stronger or burning calories.

Try this workout to tone your midsection, improve your posture and increase the efficiency of your running form.

A good core workout does not include these old-school moves.

If you don't have time for one long strength workout, break it up and make it part of your everyday tasks.

Your relatives' luggage lying around the house? There's a workout for that.

This core work can be done even if you are short on time.

Let's stop crunching our middles and start doing these easy-to-follow dynamic ab exercises.

Focus on these three key moves in the pedestal routine to get a rock solid core.

You can do this during your run, cross-training, or classes at the gym.

The latest exercise news and research—including how to take a minute off your 5K time.

Get your strength workout in while staying at home! These options are great for runners.

Take your burpee strength routine to the next level!

It's worth the time to put in core work. These moves are quick and help keep the injuries away!

These helpful hints can guarantee you get the most out of your core work.

You don’t need anything but your own body weight for these stabilization exercises, which in concert will amp up your abs.

Get your best abs ever by following these exercises—no crunches required. Are you up for the challenge? Give it a shot ahead of summer!