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.
That's their job though, most Average Joes work 8 hours a day, commute for an hour or more to & from work, have to cook/ sort out food, commute to & from the gym, work out plus other factors children, spouse etc then get up at 7:00 am the next day to do it all again
I had periods during Mr Mansized where I was overtrainined, I'd totally lost interest in going to the gym, couldn't be bothered with counting caloires, was tired & grumpy all the time & totally lost all interest in all things fitness related. Once I'd rested for a week or so & got some snap down me I was fine
Now I'm on more calories, I feel great, I'm sleeping well & I'm training with more enthusiasm. I can't wait to get to the gym tonight :)
