I bought my bike in January. The "before" results were in November of 2004. The "after" results are from late April:
Weight: before - 265 after - 255
Cholesterol: before - 272 after - 168
Triglycerides: before - 417 after - 157
This has been done without any drug therapy, with no change in diet, and while doing something I really enjoy!
My doctor is amazed. I'm happy and considering buying a more comfortable bike for longer rides.
If four months of bicycling can make this large a change, what will a year or a number of years do?