Coburn's steeplechase work is great.
However, question having non-winning times, distances, heights count as national records. Prefer the harness racing system in which only winning times count as personal records.
The first objective is to win the race. The second is to do your best. Secondary marks are fine for resumes but for nation, collegiate and high school records they deserve at best an asterisk. Q
How many American records are based on winning efforts?