From Matt Dixon’s newish book, The Well-Built Triathlete: Turning Potential Into Performance.
If you spend lots of time adding up weekly training hours and monthly totals, it’s time to put your pen down. If your lens on training success is built around a simple accumulation of hours, you cannot be maximizing your performance potential. While training volume is important, it is a derivative of a sensible training plan, not the objective. Training volume as the metric of projected success is nearly immaterial. There. I said it. I am officially, publicly, irretrievably a heretic.
In other words, I’m still working on creating my training plan for the Ironman.