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Arnold would do chins in as many varieties of angles as possible in order to hit the muscles in different positions…narrow grip, wide grip, overhand, underhand, V-bar… He always did full reps, touching his chest to the bar. Arnold suggested that if you can’t do chins then start with the lat machine and keep increasing the weight until you can pull your body weight, then graduate to chins. Then build up the number of chins and eventually start doing weighted chins. Sometimes Arnold would pick a number of weighted chins to do, say 40 or 50. Then he would keep doing sets to failure until he reached the number he set out to do even if that meant a set of 4 to 5 reps on his last set.
The back routine was as follows:
Weighted Wide-Grip Chins…….4 to 6 sets of 10-12 reps
Deadlift…………………..4 to 5 sets of 6-10 reps
T-Bar Rows…………………5 sets of 10-15 reps
Pyramid your last set of reps down!!!!!!!!!!!!!!!