Cable crunches are an excellent workout with cables to improve core strength. They focus on the sides of your core, also known as your obliques.

1. Kneel in front of a cable machine and grab the rope attachment.
2. Hold the rope by your ears, keeping your elbows bent.
3. Engage your core and crunch downwards, bringing your elbows towards your thighs.
4. Slowly return to the starting position.