* TC Williams' Noah Lyles (let) broke the 200m indoor national record in 2015
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National records go down every season.
But some are harder to break than others, and so this year we've examined the numbers by looking at what history has taught us. In this in-depth look at indoor sprint national records, we provide context into what it will take in 2020, and which candidates are best suited to go after all-time marks.
First up, we look at the boys national records. Visit MileSplit later to checkout an analysis on the girls marks.
Check out the navigation, or visit the links below.
Behind The Race: 55m - 60m - 200m - 300m - 400m - 500m