So i've spoken to a few guys who were amateur bodybuilders back in the day and they all tell me they were gym rats. Easily spending 3 hrs @ a time in the gym. Also it seems like the guys during Arnolds day also worked out that long. However i've read articles that don't recommend working out more than an 1hr-1.5hrs, claiming that the body will enter a catabolic state. Sometimes i feel like i still have a burst of energy and could easily work out another 45 mins but i tend to stop because i don't want to "overtrain".. Do you recommend i continue working out until i'm completely burnt out or keep my workouts within that 1.5 hrs?
Also in terms of recovery, if i don't feel sore the next day is it ok to work that same body part back to back. Is rest even necessary if i'm not fatigued? I know muscle is grown outside the gym and you need rest, but if you work out the same time every day that's a 24hr period where that muscle is able to rest. Isn't that enough recovery time for a muscle that was never sore to begin with?