Most Improved Girls 400m
We took the top 200 400m runners from 2018 & 2019 to figure out who was the most improved over the last year in the 400m.
| Athlete | 2019 | 2018 | Difference |
| Chelsea Freda | 1:11.87 | 1:22.94 | -11.07 |
| Jilian Schmelzer | 58.47 | 1:07.74 | -9.27 |
| Halle James | 1:00.23 | 1:06.16 | -5.93 |
| Alyssa Elliott | 1:04.43 | 1:10.02 | -5.59 |
| Emme Ayers | 1:07.61 | 1:12.24 | -4.63 |
| Jillian Brown | 1:08.55 | 1:12.85 | -4.3 |
| Jaylee Ireland | 1:05.38 | 1:09.23 | -3.85 |
| Abigail Clinch | 1:02.57 | 1:06.00 | -3.43 |
| Hannah D'Orso | 1:03.37 | 1:06.66 | -3.29 |
| Ashleigh Bolduc | 1:05.60 | 1:08.84 | -3.24 |
| Eliza Parker | 1:02.19 | 1:05.34 | -3.15 |
| Emma Abbott | 1:03.30 | 1:06.29 | -2.99 |
| Marley Powers | 1:11.10 | 1:13.55 | -2.45 |
| Victoria Bossong | 53.81 | 56.24 | -2.43 |
| Jenna Sargent | 1:08.94 | 1:11.20 | -2.26 |
| Caroline Leal | 1:09.20 | 1:11.42 | -2.22 |
| Hannah Tash | 1:11.05 | 1:13.25 | -2.2 |
| Addie Morrison | 1:04.55 | 1:06.66 | -2.11 |
| Emma Freudig | 1:10.05 | 1:12.00 | -1.95 |
| Sadie Skinner | 1:04.92 | 1:06.83 | -1.91 |
| Ashleigh Audet | 1:10.19 | 1:12.01 | -1.82 |
| Junne Robertson-McIntire | 1:03.85 | 1:05.62 | -1.77 |
| Ava Petrin | 1:02.69 | 1:04.35 | -1.66 |
| Apiyo Charles | 1:10.90 | 1:12.48 | -1.58 |
| Katie Lynch | 1:02.51 | 1:03.22 | -0.71 |
| Brooke Cloutier | 1:07.50 | 1:08.01 | -0.51 |
| Katie Pilkington | 1:06.05 | 1:06.55 | -0.5 |
| Kaelyn Lakey | 1:02.34 | 1:02.76 | -0.42 |
| Alexis Parent | 1:04.87 | 1:05.18 | -0.31 |
| Sophia Poole | 1:03.23 | 1:03.44 | -0.21 |
| Zoe Stevenson | 1:10.83 | 1:11.03 | -0.2 |
| Hannah Langstaff | 1:02.47 | 1:02.63 | -0.16 |
| Abigail Nelson | 1:05.99 | 1:06.15 | -0.16 |
| Molly Mcgrail | 58.79 | 58.94 | -0.15 |
| Willow Whitten | 1:05.42 | 1:05.51 | -0.09 |
| Calla Orino | 1:03.61 | 1:03.69 | -0.08 |
| Ella Nelson | 1:03.39 | 1:03.45 | -0.06 |