I’m training for a half marathon, so I’ve been pretty religious about getting in three to four runs per week over the past few months. But with all that running taking up my time, I knew I was ...

This standing abs routine strengthens your core, boosts posture, and lays the foundation for a stronger, more balanced body.

Your core (that means both your back and abdominal muscles) is your source of power—seriously. It's also what helps stabilize your entire body, prevent low back pain, and impact your posture, helping ...

Strengthen your core in the comfort of your home with this 14-day ab-strengthening challenge from Well+Good-approved trainers. Strong abs are the latest fitness trend, haven’t you heard? And when we ...

Your core has been getting all the love these last few weeks, so now it’s time to ramp things up by adding in some other body parts. First up? Your back, which is extra-important for keeping your abs ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." A few rounds of crunches and planks just isn’t going to cut it if you’re aiming for a six-pack. You need ...