"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." As a passionate and proud fitness coach, certified personal trainer, and mom, I know firsthand that ...

(CNN) — Planks are one of the most effective exercises for strengthening your midsection, as they target all of your major core muscles: the transverse abdominis, rectus abdominis, external obliques ...

As a passionate and proud fitness coach, certified personal trainer, and mom, I know firsthand that working out isn't all about sculpted muscles—it's about building strength from the inside out. I ...