Hi
If you are suffering during the training weeks. And your performance is dropping off, this may indicate you have over trained. Taking a week off will generally allow your body to recover fully. You can see from some of the stuff below it might take longer than 1-week
Another (Am i overtraining?) lollll
Recovering From Overtraining with Triathlete Jamie Berry - Successful Athletes Podcast 29
Overtraining- how long to recover, what to do in the mean time?