Originally Posted by DrIsotope

When I first started riding, I lost 50lbs in 3 months. Sure, the biggest component was changes to diet-- but I was so woefully out of shape that my body didn't know how to cope with exercise, so I was incredibly inefficient that weight loss was fast and almost effortless.

Fast forward to now where I ride 10,000 miles a year, run 500 miles a year, and struggle to maintain my weight. Your body gets used to whatever you're doing. Thirty six pounds down by end of summer, easy enough. Still down 36 pounds by the end of next summer... tougher.