The resistance band straight arm lat pull down for Resistance 90 primarily strengthens the latissimus dorsi and the teres minor muscles. This exercise also works the posterior deltoids, triceps, rhomboids, and teres major muscles in your upper arms. The muscles in this exercise work to extend the arm, which is the main action in this exercise. Learn more about properly executing this exercise with the video above.
Regression
Make this exercise easier by moving closer to the anchor to reduce the amount of tension on the Slastix.
Progression
Make this exercise more challenging by moving further away from the anchor to increase the tension on the Slastix or by adding another resistance band.