If you’ve ever looked at parkrun results or masters athletics results, you may have seen something called an age graded percentage. Age grading is one of the most useful ways to compare running performances fairly across different ages and between men and women, but many runners don’t fully understand what it actually means. In simple terms, age grading adjusts your race time based on your age and sex so that performances can be compared on a level playing field. A 55-year-ol