There are cycling studies done on the effective results of a 5lb weight loss. Today I shaved 3 minutes off a ride on a course that I did 3 weeks ago being 10-12lbs heavier. Those 3 weeks were spent riding the single tracks on a heavier mountain bike. Today I rode the Cannondale Criterium on the flats and hills. I have always known you could feel a 5lb weight loss but today that was very noticeable.