They call it a rest week...but I think these weeks where swimming half the normal distance is actually harder than the 'on' weeks.
I know it sounds strange but i feel lazy for not training and my energy levels are suffering from lack of endorphins. However, i am constantly telling myself these rest weeks serve a good purpose... i.e to freshen up both mentally and physically for the next 3 weeks of hard training.
Next week I start a month of tempo training where the goal is to swim constant speeds over longer distances...can't wait!!!