Today I went on a 2 hour, 36 mile ride through Marin. I used fitday to calculate calories burned and consumed. Even though I ate a lot of food today, I still found it hard to get anywhere near how many calories I burned. I dont want to lose muscle mass, so it is important for me to comsume close to the amount I burn. Anyone else having difficulty with this? Im sure if I were to go pig out at some fast food restaraunt it may be easier, but Im trying to eat clean foods.