Hike Forever: Ultimate Hiking Workouts
The secret to long-term health and fitness? Reap backpacking's many benefits–a strong heart, lean muscle, superior endurance–through every stage of your life. Here's how.
http://www.backpacker.com/may_09_hike_f ... ills/13107
I thought this was a pretty concise and informative read. Unlike most sites that overloading you with information and over complicating things.