Originally Posted by
BCRider
I had a seat post clamp come loose one time for some reason. I didn't notice but the saddle slide down only 1/2 an inch on me. Little enough that it wasn't obvious but enough that my commute seemed to suddenly be all uphill or like it was the morning after the night before. I struggled for a while before I figured out what was wrong. Pulled it up that 1/2 inch and locked 'er down better and felt young and spry again... well, OK... old and spry...

So true, my wifes rides my bike sometimes and one day riding to work really fast I didn't even realize she had adjusted it down because my mind was elsewhere. On the way back though woooah, my muscles were aching in all the wrong places and it finally clicked. Sometimes I am kind of slow.
It is unbelievable how much of a difference it makes.