Under the activities section/analysis can an additional column be introduced to indicate "age-grade percentage" I do not know how popular this is in the USA, but here in the UK it is considered a good measure of a persons fitness and performance.
Age-Grading is a way of measuring your running performance taking into account your age and sex. It enables you to produce a percentage score for each run based on how old you were when you did the run. It also takes into account your sex so you can use the percentage score to compare your performance with other runners, regardless of both age and sex.