I just had a quick look. It looks like the final result is a relatively simple calculation. If you do this, I would like to see the age graded time as well as the percentage.
However, getting the factors for the calculations is a lookup into the age grading tables. Here's a snippet from a page I found on the subject.
Do the math
age-graded time = time * age factor
At 53, Madeline Bost ran a 10K in 42:37. The women's 10K age factor at 53 is .8545. Multiplying her time by the factor (42:37 [2,557 seconds] * .8545) gives a 36:25 age-graded time.
performance-level percentage (PLP) = par 10K standard for age / actual time
The 10K standard for women at 53 is 35:01. Dividing the standard by Bost's actual time (35:01/42:37) yields 82 percent PLP.
Resources
Age-Graded Tables, the full set of factors and standards for all track and field events, is available for $6 plus $1.25 postage from National Masters News, P.O. Box 50098, Eugene, OR 97405.
The Runner's Training Diary, by Bob Glover and Shelly-lynn Florence Glover, presents age-graded tables for all distance events and instructions on their use. |
