Yeah your body composition will certainly change first. I worked to lose weight this winter and changed my body composition fairly significantly... probably lost ten lbs of fat and gained another five in muscle. Once racing season started I stopped worrying about losing weight because I just wanted to make sure that my body was flooded with the necessary calories during rides so I could keep up (I'm a high school coach-- it's tough keeping up with 17 year olds!). Now I can shift gears so to speak. Our rides this summer will be long and mostly pretty medium intensity. I certainly won't be hammering.

I suppose if I keep track of my calories on my HR monitor and avoid junk and try to keep caloric intake just under my expenditures every day that would work, but I don't really want to have to worry so much. My body is clinging to these last ten-fifteen pounds hardcore. I've been lighter before, (rarely fitter) so it's frustrating that the same things I'd done before don't work now four years later.

Anyway, this came up because I'd been reading on bike forums about people going on tours and either gaining weight or just not losing any because their eating gets out of control. I can't reallllly imagine over doing it on cereal, yogurt and peanut butter and jelly, but you never know!