Overtraining is pretty common IMO.
Basically because we don't get instant results from training.
Ie, if we feel awesome when coming into the gym for a training session, and hits some great numbers in the benchpress, that won't translate into us being stronger the next few hours.
It will take a week or two before all the gains from that session comes.
It sounds pretty basic, but the delay makes it very easy to add a few more sets than what we usually do.
And to perhaps go back into the gym one or two days earlier to hit benchpress again, earlier than originally planned.
And with weights bigger than orginally - planned.
I just think that in general, what most of us lack is a long time perspective on our training.
If we're being honest, how many of us know the weekly amount of lbs lifted, and whether or not it's more than one year ago?
Overtraining often happens IMO when things are going fcuking great and lifts are flying up.
Then we will keep lifting heavier and perhaps do a few more sets. Then a couple of weeks later we become overtrained.
However, I think training volume has to be periodized for it to be most effective.
Ie, for a few weeks a real intense and high volume could be used. Followed by something similar to Mentzer's HD for a few weeks, followed by yet again some higher volume training.
