In this video tutorial, viewers learn how to tone and build the back muscles. Expanding the size of the back will help increase the size of the chest. The exercise shown in this video is the lat pull-down. The first part of the movement is to drop the shoulder down and the second is to pull to the chin. All the finger should be one the same side of the bar. Keep your head and chest up. Do not yank or jerk the weight. This video will benefit those viewers who are interested in health and fitness, and would like to learn how to build the back muscles.