If you can already do chin - ups for multiple reps with your bodyweight, fear not! (hardgainermusclebuilding.com)
Once you can pump out multiple reps of a tough exercise like this, you'll not only develop a great - looking chest, you'll also develop phenomenal strength to boot. (chestsculpting.com)
I also like to train with multiple rep ranges to stimulate the different muscle fibers in your body. (chriscoulsonfitness.com)