Interesting drill for Latissimus Muscles

Stand straight. Tight back and puff out your chest. Grasp the handles firmly to Ekspanderite. Raise both hands above your head with elbows and hands tightened up. Hold in a vertical position and with the other hand tight Ekspanderite to a 90 degree angle between the two hands. Hold hands not sustainable and enable them to tremble. Return to the original position to start and run with the other hand.