Does the article detail his (supposed) training routine?
.....
chest/back
legs
delts/arms
training 6 days per week?
The article talks about how Arnold prepared for his role in Conan which of course surrounded the 1980 Mr. Olympia so what is said in the article one must assume it's how he possibly trained for the "O". Here's exactly how it's printed in the issue...
"First of all, thinking thin. Then I cut out all the heavy foods and ate more chicken, fruits, salad and so on." Schwarzenegger also trained lighter, with more reps, concentrating on developing his deltoids, legs and shoulder.
That part didn't make sense to me since deltoids are shoulders, but whatever. Anyway, that was all that was mentioned about anything pertaining to his exercise, reps, and weights.