Pilates is having a major moment in America, but one classic movement is suddenly getting attention for more than just core ...
Sit on the ball with your feet flat on the floor. Place your hands on the ball, or on your hips to make it more challenging. Slowly circle your hips clockwise. Switch direction after 30 seconds.
There are so many effective ways to work your core at the gym and at the home. You could grab a kettlebell and do a full-body routine with sneaky abs engagement, do bodyweight abs moves like plank ...