What is the correct way to do a plank?

To perform a plank correctly, start by lying face down, then lift your body off the ground, balancing on your forearms and toes. Keep your elbows directly under your shoulders, and ensure your body forms a straight line from your head to your heels. Engage your core, glutes, and legs while avoiding sagging or arching your back. Hold the position, breathing steadily, for as long as you can maintain proper form.