This book is written by a doctor of physical therapy to help runners and walkers continue moving with one foot fall after the next at various paces for all ages. This book covers common causes of knee pain, hip pain, achilles tendonitis, plantar fasciitis, shin splints, pulled hamstrings, back pain and WHAT to do and HOW to prevent those problems! Common patient stories are outlined to provide context and help sift through medical jargon in a meaningful way. Research and science articles are cited to support treatment decisions but not to overwhelm the reader. Exercises with pictures and links to videos are included. This book will help you develop techniques to run or walk with less impact to the joints allowing you to run or walk forever. This book will help you develop a routine in order to tolerate the stress of one foot fall after the next whether you walk or run and regardless if it is track, cross country, roads, sidewalk or trails.