Is it possible to workout too long? If so, why?
At the beginning of this year I started really working hard at the gym and would lose track of time and would sometimes workout for almost 2.5 hours. The workouts usually consisted of 2+ hours of intense weight lifting followed by 15-20 minutes of ab workouts. I never had any negative side effects from it though. After doing some research, I noticed a lot of people thought this was too long.
I may need to create a separate question for this, but I've recently read that during long workouts BCAAs may be beneficial. Would adding BCAAs mid-workout allow you to increase the workout length?
Edit: Here is an example of some of the things I came across. It seems that a lot of people say things like "Don't workout longer than an hour." I want to know why, and just blaming it on overtraining is not a sufficient answer.
This article says this:
"And after sixty minutes your body will start to produce less testosterone and more cortisol, which is a hormone that eats muscle tissue and increases body fat storage."
Is this true?