Originally Posted by
chasm54
All I can say to this is, that either you naturally don't eat all that much or you are extremely fortunate in your metabolism. I am not a huge eater - though I do drink more alcohol than I should - and I can and do put on weight even though I spend more than ten hours per week on the bike, unless I also pay attention to what I consume.
When I drank a lot more alcohol than I should have, I got up to about 220. After I stopped drinking, I maintained at around 160 (until I started biking and dropped to 140). I replaced alcohol with chocolate chip cookie dough ice cream, but those calories seem to matter less. I can only conclude that human metabolism is very idiosyncratic.