That’s a lot to take in, but just know that paying attention to this valuable group of muscles is so important. For the purposes of this workout, we’re going to focus on non-glutes core strength (stay tuned for a more glutes-specific workout). In this five-move routine, you’ll find your strength by working to control torque and rotation, firing up the obliques, and calling on lower abdominal control—all with one single dumbbell.