Some Training Guidelines
WEEKLY TOTAL MILEAGE: Never increase your weekly mileage by more than 10%. Example: If you ran a total of 10 miles last week, then this week you would either stay at 10 miles or run no more than 11 miles. Gradual increase is part of injury prevention.
WEEKLY LONG RUN: Your long run for the week should be between 20-30% of your total weekly mileage. Example: If your weekly mileage is set at 15 miles, your long run for that week would be 3-4.5 miles. Choose what is right for you based on what you have been running previously. Too much too soon can lead to injury and burnout.