Your Core Routine Needs More Than Crunches. Use These Abs Exercises to Strengthen Your Six-Pack.

You'll need better moves to build a functional core. Here’s how you can upgrade your workouts.
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Jennifer Aniston's personal trainer shares a 15-minute core routine

Grab a Pilates ball and build core strength and stability ...
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6 medicine ball exercises you should try, according to a personal trainer

We'd never strong-arm you, but there are so many benefits to adding a medicine ball to your workout. (Getty Images) I'll admit it: For years, I avoided adding a medicine ball to my workouts. Frankly, ...