Sit centered on a stability ball with your feet flat on the floor, shoulder-width apart. Position the ball so your hips and knees are bent at 90 degrees, ensuring a stable base.

1. Cross your arms over your chest or place hands behind your head.
2. Brace your core and slowly crunch, twisting your left elbow towards your right hip.
3. Hold the peak contraction briefly, squeezing the side abdominals.
4. Slowly return to the starting position without losing core tension.
5. Alternate sides immediately, crunching the right elbow toward the left hip.
6. Continue alternating sides for the desired number of repetitions.