Anyone here ever get what I can only describe as burning lungs when hammering on your roadie??? The thing is, I just started getting this about 3 weeks ago. I've had rubber legs, tired arms, and been out of breath but this feels different. Could it be a general fitness problem ?? Maybe I've slipped back during the winter ?? Although in March, on my second ride of the season, I rode 58 miles. I was tired but did not have the lung thing I mentioned.