swimMayuko Tsukasaki
Personal records
| Event | Course | Best | Cut | Date | Meet |
|---|---|---|---|---|---|
| 50 Freestyle | SCY | 43.28 | +9.19s to B | 2025-12-07 | 2025 PN Fall Divisionals, Division 1 - OCA venue |
| 50 Backstroke | SCY | 53.99 | +15.20s to B | 2025-12-07 | 2025 PN Fall Divisionals, Division 1 - OCA venue |
| 100 Backstroke | SCY | 1:33.51 | +6.92s to B | 2026-04-25 | 2026 PN SSCD Spring Open- Approved |
| 50 Breaststroke | SCY | 54.11 | +10.12s to B | 2026-02-08 | 2026 PN SMAC February Mini Meet- Approved venue |
| 50 Butterfly | SCY | 1:02.26 | +25.27s to B | 2025-06-08 | 2025 PN SMAC June Mini Meet slow pool |
| 100 Individual Medley | SCY | 1:56.72 | +31.43s to B | 2025-12-07 | 2025 PN Fall Divisionals, Division 1 - OCA venue |
Cuts are USA Swimming single-age motivational standards (B → AAAA) at age 12.
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.
IMX / IMR
IMX 11-12 · SCY
301 points (1/5 events — incomplete)
| Event | Time | Points |
|---|---|---|
| 100 BK SCY | 1:33.51 | 301 |
| 500 FR SCY | — | 0 |
| 100 BR SCY | — | 0 |
| 100 FL SCY | — | 0 |
| 200 IM SCY | — | 0 |
IMR 11-12 · SCY
633 points (4/5 events — incomplete)
| Event | Time | Points |
|---|---|---|
| 50 BK SCY | 53.99 | 156 |
| 50 BR SCY | 54.11 | 226 |
| 50 FL SCY | 1:02.26 | 87 |
| 100 IM SCY | 1:56.72 | 164 |
| 200 FR SCY | — | 0 |
Scored against AAAA motivational base times: ordering is exact, absolute points run ~25% above the official USA Swimming scale.
PR splits
100 Individual Medley SCY 1:56.72
Front half 58.02s · back half 58.70s
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.