I'm a marginal Clyde. In my distant youth, running 50-70 miles/week I could eat a house without gaining weight; I was an extremely fit 185-190 lbs. Now I'm a senior citizen cyclist and I believe that the equivalent cycling weekly mileage is north of 100 miles, but not far north. I do ride hard and I know that my base metabolism is definitely up, but I think once I get up to 125 miles/week I should be able to inch my way down to 185 lbs without paying much attention to what I consume. Anyone else have a similar experience.