Resting makes you tired

After a pretty tough week with regards to rowing, I finally decided to take a rest day – I didn’t feel like one, but my training diary suggested I should take one, so I did. The result was that the training load hit me like a freight train once I rested. Today – after taking a days rest yesterday – I feel TIRED!
What does one do when they are tired?
They decide to run 12km in snowy conditions on a track with very bad footing; that’s what one does if one is me!
The result of this is twofold – or possibly three:
1/ I will put off my return to swimming yet another week.
2/ I will be even more tired tomorrow
3/ I will be fitter next week?
Let’s see how it goes. As it now stands, I will make no plans for tomorrow.