ahaha, my PS now making everyone pull b4 every meal 
But SAF trainin uses shoulder shrugs for training. Pull ups has 2
stages, the start and the actual pull
The start uses the back muscles n the pull uses the upper arm.
Upper arm easy, train biceps n triceps. Back muscles [which is the
problem most of the time] u need 2 do shoulder shrugs. Hang from
the bar and shrug 10 times. Plus, lose weight, that helps 2
Lex {+.+}