If you’re looking to build a stronger, more defined core, cable crunches are worth adding to your routine. They specifically target the rectus abdominis—the muscle group responsible for that six-pack look—but they also do a lot more than that. Unlike traditional floor crunches, this exercise uses a cable machine to keep tension on your abs throughout the entire movement, which makes it incredibly effective for building both strength and stability. Not sure where to start? Don’t worry. Here’s everything you need to know—from setup to form to the different ways you can mix it up. How to Perform a Cable…