swimCharlotte Kooistra
Personal records
| Event | Course | Best | Cut | Date | Meet |
|---|---|---|---|---|---|
| 50 Freestyle | SCY | 29.97 | A+0.68s to AA·+3.48s to Sectionals | 2025-10-17 | 2025 WMS Boo Bash |
| 100 Freestyle | SCY | 1:10.07 | BB+3.48s to A·+14.18s to Sectionals | 2025-02-22 | 2025 Lake Michigan Regional Meet |
| 200 Freestyle | SCY | 2:27.04 | BB+2.05s to A·+28.45s to Sectionals | 2025-11-15 | 2025 GR Gales of November Open Invitational |
| 50 Backstroke | SCY | 35.85 | BB+1.06s to A·+8.56s to Sectionals | 2025-10-17 | 2025 WMS Boo Bash |
| 100 Backstroke | SCY | 1:38.40 | +7.71s to B·+34.41s to Sectionals | 2025-11-16 | 2025 GR Gales of November Open Invitational venue |
| 50 Breaststroke | SCY | 1:00.98 | +15.49s to B·+30.29s to Sectionals | 2026-01-10 | 2026 Zeeland Winter Classic venue |
| 100 Breaststroke | SCY | 1:18.36 | AA+0.27s to AAA·+6.57s to Sectionals | 2025-05-09 | EGRA Intrasquad 2025 |
| 50 Butterfly | SCY | 39.01 | +0.12s to B·+12.32s to Sectionals | 2024-10-18 | 2024 Boo Bash Invitational |
| 100 Butterfly | SCY | 1:46.89 | +16.10s to B·+44.00s to Sectionals | 2026-02-07 | 2026 Grand Rapids Open venue |
| 100 Individual Medley | SCY | 1:20.08 | BB+4.09s to A | 2025-10-17 | 2025 WMS Boo Bash |
| 200 Individual Medley | SCY | 3:32.83 | +20.04s to B·+78.54s to Sectionals | 2025-11-02 | Greater Kalamazoo Arena Challenge venue |
| 50 Freestyle | SCM | 43.10 | +4.01s to B | 2026-05-09 | 2026 WMS Spring Splash SCM venue |
| 100 Freestyle | SCM | 1:35.59 | +9.70s to B | 2026-05-09 | 2026 WMS Spring Splash SCM venue |
| 50 Backstroke | SCM | 1:02.74 | +17.85s to B | 2024-05-11 | 2024 WMS Spring Splash slow pool |
| 50 Butterfly | SCM | 53.26 | +10.27s to B | 2026-05-09 | 2026 WMS Spring Splash SCM venue |
| 100 Individual Medley | SCM | 1:49.73 | +11.74s to B | 2026-05-09 | 2026 WMS Spring Splash SCM venue |
| 50 Freestyle | LCM | 38.78 | B+1.19s to BB·+9.09s to Sectionals | 2024-07-13 | 2024 West Michigan Classic |
| 100 Freestyle | LCM | 1:25.32 | B+2.53s to BB·+22.63s to Sectionals | 2024-07-13 | 2024 West Michigan Classic |
| 200 Freestyle | LCM | 3:24.81 | +11.82s to B·+70.12s to Sectionals | 2025-06-14 | 2025 JAWS Sun & Fun venue |
| 50 Backstroke | LCM | 55.28 | +8.49s to B·+23.79s to Sectionals | 2025-07-12 | 2025 West Michigan Classic venue |
| 100 Backstroke | LCM | 1:54.07 | +8.28s to B·+40.78s to Sectionals | 2026-06-27 | 2026 JAWS Sun & Fun ABC Spectacular & IMX venue |
| 50 Butterfly | LCM | 55.18 | +11.59s to B·+24.89s to Sectionals | 2026-06-21 | 2026 Summer Solstice Meet venue |
| 100 Butterfly | LCM | 2:04.00 | +20.61s to B·+54.31s to Sectionals | 2026-06-28 | 2026 JAWS Sun & Fun ABC Spectacular & IMX venue |
Cuts are USA Swimming single-age motivational standards (B → AAAA) at age 11.
National cuts (Sectionals → Nationals) are the current-season meet qualifying times for the swimmer's zone and age group; ✓ marks the hardest cut already achieved.
Pool tags are a venue speed heuristic (median deviation of all swims there vs each swimmer's typical time) — see the venue page for the method.
Fastest relay legs
| Leg | Course | Time | Start | Relay | Date | Meet |
|---|---|---|---|---|---|---|
| 50 Freestyle | SCY | 32.15 | flying | 200 Free Relay (leg 4) | 2025-06-07 | 2025 Zeeland Summer Classic |
Reconstructed from relay split marks. Flat = lead-off (comparable to individual times); flying starts run ~0.5–0.7s fast and are not PRs.
IMX / IMR
IMX 11-12 · SCY
1481 points (4/5 events — incomplete)
| Event | Time | Points |
|---|---|---|
| 100 BK SCY | 1:38.40 | 258 |
| 100 BR SCY | 1:18.36 | 759 |
| 100 FL SCY | 1:46.89 | 193 |
| 200 IM SCY | 3:32.83 | 271 |
| 500 FR SCY | — | 0 |
IMR 11-12 · SCY
2125 points (5/5 events)
| Event | Time | Points |
|---|---|---|
| 200 FR SCY | 2:27.04 | 569 |
| 50 BK SCY | 35.85 | 534 |
| 50 BR SCY | 1:00.98 | 158 |
| 50 FL SCY | 39.01 | 357 |
| 100 IM SCY | 1:20.08 | 507 |
Scored against AAAA motivational base times: ordering is exact, absolute points run ~25% above the official USA Swimming scale.
PR splits
100 Backstroke SCY 1:38.40 RT 0.89s
Front half 49.38s · back half 49.02s
100 Butterfly SCY 1:46.89
Front half 49.16s · back half 57.73s
200 Individual Medley SCY 3:32.83
Front half 100.84s · back half 111.99s
100 Freestyle SCM 1:35.59
Front half 47.25s · back half 48.34s
100 Individual Medley SCM 1:49.73
Front half 50.85s · back half 58.88s
200 Freestyle LCM 3:24.81
Front half 99.99s · back half 104.82s
100 Backstroke LCM 1:54.07
Front half 58.07s · back half 56.00s
100 Butterfly LCM 2:04.00
Front half 58.17s · back half 65.83s
Reaction time
From electronically-timed starts only (~2% of corpus swims carry a reaction time). PRs with a recorded reaction show an RT chip in the splits section above.
Progression
Faster times are higher. One card per event, all courses & history.