Instructions:

1. Start in a high plank position with your hands directly under your shoulders and your body in a straight line.
2. Engage your core and bring your right knee towards your chest, then quickly switch and bring your left knee towards your chest.
3. Continue alternating legs in a running motion, keeping your hips low and your core engaged.
4. Maintain a steady pace and breathe evenly throughout the exercise.
5. Repeat for the desired number of repetitions.