Didn't know where this should go. Seems like it's probably a newb question, so I'll ask it here.
Despite for a time being really overweight (240 pounds, 42" waist), I've always been pretty athletic. I lost most of my weight the last few years of high-school. In college I was active, did BJJ, Skied, SAR, what not, but most of my training was basically aimed at not getting fat while reading 10+ hours a day, and drinking lots of beer.
As such, I didn't eat much, and did lots of cardio everyday.
Now I like being able easily run six min miles all day long, but now I'm trying to build some muscle, both for strength and aesthetics.
Old habits are hard to kick. Even on my "off" days, I run/sprint for 20min to an hour... basically, seven days a week I do at least 20 min of interval training. If not that + anywhere from 40 min to two hours of some other running around (running, biking, hiking w/pack).
Is this doing me any harm/good? Should my off days be totally off (I lift 4-5 days a week depending).
What say the T-Nation Gods. I enjoy doing it, but...