There seems to be too strong of a perceived correlation between weight loss and fitness. There two are certainly related but you CAN have one without the other. If you are riding for over an hour a day, every day, you are almost definitely in fair physical condition at worst. Fitness comes not from having a specific workout routine and killing yourself in the gym. It comes from a certainly lifestyle, and the lifestyle of those that choose to ride their bike 20+ miles a day is certainly conducive to improved health whether or not you lose those 5-10 pounds.