In a fitness world of here-today, gone-tomorrow trends, kettlebells have stood the test of time. They’re versatile and effective, offering a great core workout when used properly. “Because of their center of gravity, kettlebells force your body to work harder to keep them stable and controlled,” says New York City-based personal trainer and wellness coach Karolina Duncan. They also target your abs from different angles and require core strength to hold yourself up in the movements. “This makes them a perfect addition to an all-over total body workout or even after a run,” she says.

To start, grab a single kettlebell and stand with feet shoulder-width apart, the heavier kettlebell resting on the ground about a foot in front of your legs. Squat down and grab the handle with both hands, shifting hips back and chest up to tip the kettlebell towards your shins. Then, push through your legs and swing the kettlebell back up to shoulder height. Maintain your core tight, and repeat for 10 reps. Read more how to use kettlebells for abs – strongandfit.com

Standing Abs Ignited: Kettlebell Exercises for a Strong and Sculpted Core

This is a more advanced move that works the obliques—the ab muscles running around your side waistline, which help prevent hunching or rounding your back. To perform, sit in a V position, holding the kettlebell with both hands in front of you. Then, reach the kettlebell to your left forearm while bending forward and twisting your body, allowing the weight to touch the floor on one side before returning to the starting position (one side-to-side is a rep).

To finish the workout, hold a lighter kettlebell in the air overhead with both arms locked out at your sides. Lower down into a reverse lunge until your left knee grazes the floor, and as you rise, pass the kettlebell underneath the leg into the right hand. Return to the overhead position and repeat, alternating sides each time.