You'll need better moves to build a functional core. Here’s how you can upgrade your workouts.

The exercises you'll include in your routine to target these posterior muscles (which include your rear delts, rhomboids, ...

You don't need to do thousands of sit-ups or spend hours in the gym to build abs. You can instead do the bare minimum of two to three ab-focused exercises for 20 to 30 minutes a week. Exercises like ...