Every amateur runner is ever seeking the answer to how many miles he should run per week. The answer to that question depend a lot on sex, age, years of training and a runners tolerance to pain.
The best answer I found was from a physical therapist and biomechanist Irene Davis, Ph.D., from the University of Delaware’s Running Injury Clinic. This was her take on the question when asked in a runners world article.10 laws of injury prevention.
“Your threshold could be at 10 miles a week, or 100, but once you exceed it, you get injured.” Various studies have identified injury-thresholds at 11, 25, and 40 miles per week.
To know how many miles you should run per week, just clock the miles and the level at which you start experiencing injury, thats your level. Your threshold is waiting for you to discover it!