There's so much to love about ab workouts, and I'm not just talking about how they strengthen your core muscles and give you that hurts-so-good burn in your midsection. Beyond all that, one great ...

I never go for a run without doing an ab workout first. Why? It warms up my body, gets me in the mood to work out, and — most importantly — engages my core, which is key before any workout. (It's also ...