I can't explain it - but I can describe it.
Today's LSD was utter crap. Just felt empty, tired, unispired, and void of "mojo".
Weather was beautiful and the conditions were ideal. I really can't put my finger on an explanation.
Still did 14 mile - but other than getting home and getting my shoes off, I can't think of one part I enjoyed.
Ah....well...lt happens from time to time.