This 4-week plan will help you recuperate from the race, maintain your fitness and stay injury-free. It starts with rest and cross-training to help recovery, and gradually adds mileage and speed so that within one month of crossing the finish line, youll feel as fit and fresh as you did before the race. Do cross-training and easy runs at a relaxed pace (below 70% of heart rate). Also, listen to your body. If you feel acute pain or lingering fatigue, progress to next week training only when you can comfortably complete the preceding weeks goal..