I participate on a wine forum pretty regularly. Oddly enough there is an active bike section there as well (a running thread so to speak). Now most of these guys are in the fitter category, but all of them are professionals and none of them seem to look down on those less fit.
In conversations with them recently I realized something. Most of those guys train with power, and use the analysis aspect more than I see here on this forum.
I also use training peaks, where I not only track all my workouts (running, biking, and hotel gym workouts) but I also have a withings scale and it sends my weight daily to TP.
I have been doing this almost a year now.
It is amazing to me to see the obvious correlation between my weight and my training. When I look at the charts over a year, its CLEAR to see where my weight started going down, and my training started going up. I can also see the reverse of that. A few months ago, I slacked off...and sure enough I gained about 7 lbs. About 3 weeks ago, i got serious again and went back to 5-6 days a week, and sure enough my weight peaked the week after I started, and then trended down.
I can see periods where I traveled a lot, and blew off training, and can clearly see how my weight either went up a pound or two, or stayed the same. Then I can see the week after a hard training week, where it always started back down.
My point is I dont think over that time, I really varied my diet all that much, but what seems to be more constant to me is that the more I work out, the more I lose.
Graphing data really opened my eyes, and i thought it may help one of you.
I can also say its often surprised me how little I had done in a period...if you had asked me, I would have said I exercised more, but when i went back and looked at it on a month by month basis, I was always wrong.