Lowered pull - ups are a great pull - up variation that emphasizes the eccentric part of the movement for maximum back hypertrophy. (fitnessandpower.com)
When performing this exercise, you should focus on performing the eccentric part of the movement as long as possible. (fitnessandpower.com)
As you might already know, both types of muscle action are equally important for the muscle building process, and muscles actually produce the biggest amount of force during the eccentric part of the movement. (fitnessandpower.com)