I have been sick for a week. wanted to ride everyday but my legs back and neck were all sore and achy. I am a fair weather rider and I hate riding in the cold even with the appriopriate gear. I ride mainly on my rollers now, which I was doing everyday. got sick and even though mentally I wanted to, physically it was hard enough to get off the couch. I say ride if you can OR want to. if you feel like you need sleep or your body hurts, then listen to your body.