Originally Posted by surfncycling
...if you push it really hard one day and the next day when you wake up your legs feel awful, taking an easy spin that day to get more blood flowing through the damaged muscles and clearing out any residual lactic acid build up is a good idea.
I check my resting heart rate every morning. If it goes up more than 6 beats or so, I ride easy that day. I also try to split up my LT days with easy zone 2 rides.