This video shows you how to correctly do the exercise called "the Plank". For beginners, turns of fifteen to thirty seconds are suggested, and you can end up doing minutes after you practice. "The Plank" exercise consists in trying to keep your body in a strait position, somewhat lifted, supporting it only in your toes and arms from the elbow down. You can also do some movement while in that position. Leaning to a side, and then to another, without touching the ground, and always stopping in the middle for a second to arrive in the basic position. While exercising, it is important to keen breathing regular, and to keen your abs drown up into your spine to make the exercise more effective.