The plank (also called a front hold, hover, or abdominal bridge) is an isometric core strength exercise that involves maintaining a position similar to a push-up for the maximum possible time.
I’ve been working out with my trainer Marcus — I met him at Gold’s Gym — for the last two years. We do what he calls total body fitness. We do calisthenics, we do steps, we do a lot of planks, and we do a lot of football drills. We do heavy rope for cardio. I feel stronger for doing it.