Which brings back my question does a 60 something score with a 20 something, or does a 60 something see how they stack up against others in their age group?
What does it matter when you are completing the same task? What's got to be done, has got to be done regardless of age.
Run one, look at your times. Figure out your takeaways, train, run another and see if you improved.
It's pretty simple. Nicely so...