Though you might not be able to see them, we all have the muscles that make up a six-pack. If you're on a mission to define your abs, eating well and increasing your cardio fitness are crucial steps to unlocking a leaner you. But just as important is starting a routine that will strengthen your core muscles.
Try adding some spice to your usual set of crunches, oblique twists and back extensions with these four exercises that will maximize your muscle activation even more than traditional, isolated exercises because they mimic the way we use our core muscles throughout the day. Be brave and try some integrated core exercises for three-dimensional results!