There's been some info floating around on the web that Arnold depended on Primo and Dbol for his regimine. In terms of how often he trained, it's unbelieveable that he ALWAYS trained 6 days per week ALL the time. The only thing that seemed to have changed were the exercises he did when he was bulking or cutting, seeming to go alot heavier while bulking.
At any rate, where exactly is that quote from regarding this Marnul character to claimed to have helped Arnold with his drug intake? As well, does this unauthorized biography give any further insight as to how he trained?