Year-Over-Year Improvements: 2016 To 2017 Deltas In The Girls' Sprints/Hurdles

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Who made the best improvements since last season? We calculated the girls' deltas from 2016 to 2017 for sprinters and hurdlers. Subtracting their 2017 best from their 2016 best of the top 1,000 in each event, we come up with a number that shows the progression or regression of each athlete year-over-year.

Have a look at our findings by paging over or directly jumping the event below:

100m | 200m | 400m | 110mH | 300mH

Note: List uses performances in the MileSplit database. To be included, athletes must have both 2016 and 2017 performances in the database. No hand-times were used; only F.A.T. Under 'difference', regression is indicated in parentheses and progression is indicated without parentheses