Orthopaedics & Sports Medicine Owensboro (OSMO) is the premier provider of orthopaedic and rehabilitation services in northwest Kentucky.
Age-Grading is a way of measuring your running performance taking into account your age and sex....you can effectively score every run you do. Age-Grading is a way of measuring your running performance taking into account your age and gender.
Best Answer: The average time or 50% percentile for a 13 year old girl to run a mile according to data from the President's Physical Fitness Test is 10:23.This includes all 13 year old girls not just ones who run track. Once you limit the group to girls who run track then the number goes down.ating Newest Oldest. Best Answer: The average time or 50% percentile for a 13 year old girl to run a mile according to data from the President's Physical Fitness Test is 10:23. This includes all 13 year old girls not just ones who run track.