Michelle Monaghan, who plays Jaclyn on the hit HBO show, has shown off her strong core in workout scenes, as well as shots by the pool while she lounges with her two childhood pals Laurie (Carrie Coon ...

Are you one of those who spend time on abs hoping to strengthen your core, define your waist, or just feel stronger, but feel ...

Reason: "Your transverse abdominis muscle acts like a corset when dropping the legs to protect and support the body and spine. This exercise will strengthen the obliques, transverse abdominis, pelvic ...

The reverse crunch is a simple core exercise that targets those hard-to-hit lower abs — without straining your neck and back.

That's why we chatted with Rachel MacPherson, CPT, a certified personal trainer and strength and conditioning specialist, who ...