In Overtraining, Overreaching and all the Rest Part 1, I gave a detailed definition of overtraining which I’ve reproduced below.
Overtraining occurs when there is a long-term imbalance between the training load and recovery processes that, for a given athlete, leads to a decrement in performance that takes more than 2-3 weeks to return to normal.
Having examined the details of performance decrement/underperformance syndrome in Overtraining, Overreaching and all the Rest Part 2, I want to back further up the definition and look at the idea of the balance between training load and recovery being the root of the issue (at least at a global level). I also want to make the point that explicit training and recovery is not all that needs to be considered here. Finally, I’ll also look at the idea of underrecovery as a bigger issue than overtraining per se.
What Causes Overtraining Part 1
A long standing question among sports scientists is what the actual ’cause’ of overtraining is, although they are usually looking at it in more of a biological sense than what I am going to talk about today. I may talk about that later in the series but, for the most part, much of what research has looked at (e.g. muscle glycogen, muscle damage, etc.) is neither practically nor easily measurable. Rather, in this section I want to look at the more global ’causes’ of overtraining.
In simple terms, we really need to consider two major and interacting processes on the body which are:
- Training load: volume, intensity, frequency, etc.
- Recovery processes: representing a whole mix of different stuff.
Or think of it more simply as stress on one side of the equation and recovery on the other side. Where the balance of the two determining whether a given athlete improves, stagnates, or regresses during their training. Simply but reasonably accurately, we can say that: