Wow, good to see the old threads getting some love still. Prae is right, I'm training for 2 hours every day for 6 days now and I'm seeing more growth. Cortisol is only an issue if you literally destroy yourself and then try to keep going but even then it's very difficult to reach that point and at that point it's just flat out overtraining anyways- the 'true' kind of overtraining. As long as you pace yourself and train with common sense you should be fine. Also ta-kid has a good point, it wasn't until I started training for longer that I noticed that my body responds better, everyone is different and people need to find out what works best for them instead of listening to people on the internet who half the times don't even have any scientific studies, training experience or years to back up what they are saying.

-Primal