I decided to talk about recovery and how to really do proper recovery rides, because I suffered this problem myself in the future, riding too hard and then feeling tired next day or week. If you really want to have great recovery - make sure you are not riding in more than Zone 1 and not longer than 1-2 hours. Keep your cadence high as well (80-100 rpm) to make sure your legs are not getting tired and you are able to spin all the lactic acid out of your muscles :)