Originally Posted by BluesDawg

Rules, schmules. 10% is a suggestion, a guideline. The idea is to not add too much, too quickly. I've know people for whom 10% increase in miles per week would be too much. I've been riding with a friend who two months ago had never ridden further than 25 miles at a time. Within a couple of weeks she was riding 50, then 65, then 80. Last weekend she rode a 109 mile ride with me and was fine.