I don't think overtraining is a problem for most people. I like the example of people who are training everyday like in the army who don't become overtrained. I don't think I could overtrain if I tried! Just make sure you're sleeping well and nourishing the body with plenty of good food.
I am going to perform a little trial on myself and see if I notice any negative or positive effects from training a lot more than I already do. Watch this space......
Don't think it's quite that simple and would also depend on how the person trained really, I use myself as an example and always put everything in to my workouts, as I said previously I used to do a 6 day split routine and initially didn't mind it but it just seemed to wear me down and in my opinion it was overtraining...
