As a former U.S. Marine, Erin Oprea is dedicated to fitness. Now a Nashville-based personal trainer with clients like Carrie Underwood, she uses her expertise to help those with busy lives stay fit.

Looking to amp up your core workout with a move that really targets those stubborn lower abs? Enter the reverse crunch. This exercise zeroes in on those hard-to-reach lower abdominal muscles, helping ...

The horizontal ab squat is a core exercise that strengthens your lower abs and hip flexors without weights while remaining ...

For core workouts from Stephanie Mansour — plus fitness challenges, walking podcasts, meal plans and inspiration — download the Start TODAY app! When it comes to toning the abdominals, many of my ...

No gym? No problem! When it comes to getting a great workout, there is no better equipment than your very own body. "Bodyweight training is incredibly effective and accessible for everyone, regardless ...

It's a well known fact that all runners need to strength train to protect themselves from injury, and run at their best. But what exercises are best for runners and how often should runners be ...