Being a good 1500 runner is not always good for the Decathon/ As can be seen from the progression of Daley Thompson his best in 1500 is at the age of 18: 1500 age 4:30.9 17 4:20.3 18 4:23.8 19 4:22.8 20 - 21 4:25.49 22 - 23 4:23.81 24 4:29.72 25 4:35.00 26 - 27 4:26.16 28 4:48.78 29 4:45.11 30
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