A personal trainer shares his four favorite core exercises to do with a medicine ball

Woman facing off camera standing holding a medicine ball arms outstretched in front. she's in a living room setting with a window behind her .

Sit-ups and crunches have their place in core workouts, but doing them on repeat gets boring fast—and limits your results.

Building functional core strength means training your body to do more than just crunch up and down; you need to challenge your muscles to twist, reach, and stabilize you from every angle.