| Most improved players during the past 12 months | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rank | last/PR | old/PR | PR/inc | Name | Rank | last/PR | old/PR | PR/inc | Name | Rank | last/PR | old/PR | PR/inc | Name |
| 1 | 47.63 | 43.47 | 4.17 | Lazorchak, Pamela | 2 | 46.78 | 43.22 | 3.56 | Swimmer, Dorothy | 3 | 45.87 | 45.04 | 0.83 | Riikonen, Charlene |