Running Training What is the 10% rule in running? March 3, 2026 by Mercier | Leave a Comment The 10% rule in running is a popular guideline suggesting you shouldn’t increase your weekly mileage by more than 10% from the previous week. This gradual progression aims to prevent injuries by allowing your body to adapt to increased training stress. Adhering to this principle helps build endurance safely and effectively for runners of all […] Read more ยป