CORE TRAINING IS far too often misunderstood. The default plan for lots of guys is to crank through situp reps—but that only trains one function of the core, trunk flexion, and it's easy to get sloppy ...

As part of the Women’s Health Flex Challenge, trainer Jenna de León takes you through this snappy circuit that includes four ...

ARE YOU SPENDING your summer crunching away, trying to get visible abs for the remainder of the sunny season? You can pile up all the situp reps you want, but you won't be much closer to the core ...

Katrina Carter, DPT, FNS, is a licensed travel physical therapist. She specializes in orthopedics and has a passion for providing education on nutrition for healing and overall health and wellness.

We all know by now that sitting is bad for you. Research shows that sitting for long hours at a desk can weaken your core, tighten your hips, and lead to nagging lower back pain and poor posture.