1. Begin in a side plank position, with your elbow directly beneath your shoulder and your body in a straight line from head to heels.
2. Stack your feet (or place one in front of the other for more stability), and raise your top arm above your head.
3. Engage your core and keep your hips elevated to avoid allowing them to drop during the exercise.
4. Exhale and bring your top elbow down as you lift your top knee up, aiming to touch them together.
5. Inhale as you return to the starting position, extending your arm and leg back to their original position.
6. Perform the desired number of repetitions or for the set time, then switch sides and repeat the same number of reps/time.
7. Keep the movement controlled and focus on the contraction of your obliques during the crunch.
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