Returning to running following an injury requires a calculated progression. Depending on your condition and symptoms, customize the time taken to complete this program by repeating training sessions or modifying recovery time between sessions.

Return to running following a minor injury, an extended break or after an "off season" period requires a calculated progression. Interval Program #2 may be used when returning from a minor injury that required less than one month of rest. Even high-level athletes, after resting for two weeks or more, will have to resume training gradually using a program like Interval Program #3.