swimMayumi So
Personal records
| Event | Course | Best | Cut | Date | Meet |
|---|---|---|---|---|---|
| 25 Freestyle | SCY | 23.48 | 2024-02-10 | 2024 PX3 Valentine Openslow pool | |
| 50 Freestyle | SCY | 52.82 | +12.93s to B·+27.53s to Sectionals | 2024-02-10 | 2024 PX3 Valentine Openslow pool |
| 100 Freestyle | SCY | 1:24.98 | B+3.79s to BB·+30.49s to Sectionals | 2025-07-20 | 2025 ISI Summer Regional Championship - SCSTvenue |
| 500 Freestyle | SCY | 8:00.46 | B+14.77s to BB·+165.47s to Sectionals | 2025-07-18 | 2025 ISI Summer Regional Championship - SCSTvenue |
| 25 Backstroke | SCY | 27.66 | 2024-02-10 | 2024 PX3 Valentine Openslow pool | |
| 50 Backstroke | SCY | 39.28 | BB+1.29s to A·+11.99s to Sectionals | 2026-07-18 | 2026 ISI Summer SCST Regionalvenue |
| 100 Backstroke | SCY | 1:20.12 | A+1.73s to AA·+19.63s to Sectionals | 2026-07-19 | 2026 ISI Summer SCST Regionalvenue |
| 25 Breaststroke | SCY | 33.08 | 2024-02-10 | 2024 PX3 Valentine Openslow pool | |
| 50 Breaststroke | SCY | 39.92 | AA+1.03s to AAA·+9.23s to Sectionals | 2026-07-19 | 2026 ISI Summer SCST Regionalvenue |
| 100 Breaststroke | SCY | 1:28.60 | AA+3.91s to AAA·+19.11s to Sectionals | 2026-07-18 | 2026 ISI Summer SCST Regionalvenue |
| 25 Butterfly | SCY | 29.02 | 2024-02-10 | 2024 PX3 Valentine Openslow pool | |
| 50 Butterfly | SCY | 34.58 | AA+1.39s to AAA·+7.89s to Sectionals | 2026-07-19 | 2026 ISI Summer SCST Regionalvenue |
| 100 Butterfly | SCY | 1:17.82 | AA+1.83s to AAA·+18.23s to Sectionals | 2026-07-18 | 2026 ISI Summer SCST Regionalvenue |
| 100 Individual Medley | SCY | 1:27.72 | BB+5.13s to A | 2026-03-01 | 2026 Winter ISI Regionals- BSCslow pool |
| 200 Individual Medley | SCY | 2:54.55 | A+6.16s to AA·+41.56s to Sectionals | 2026-07-18 | 2026 ISI Summer SCST Regionalvenue |
| 50 Freestyle | LCM | 46.72 | +1.33s to B·+17.93s to Sectionals | 2025-06-08 | 2025 Lisa Coole Memorial Classicvenue |
| 100 Freestyle | LCM | 1:40.80 | B+7.71s to BB·+39.01s to Sectionals | 2025-06-07 | 2025 Lisa Coole Memorial Classicvenue |
| 50 Backstroke | LCM | 53.58 | B+3.89s to BB·+22.09s to Sectionals | 2025-06-07 | 2025 Lisa Coole Memorial Classicvenue |
| 100 Backstroke | LCM | 1:31.03 | A+0.64s to AA·+20.54s to Sectionals | 2026-07-25 | 2026 ISI LC 10&U Age Group Championshipsvenue |
| 50 Breaststroke | LCM | 45.74 | AA+1.45s to AAA·+10.15s to Sectionals | 2026-07-25 | 2026 ISI LC 10&U Age Group Championshipsvenue |
| 100 Breaststroke | LCM | 1:42.95 | AA+4.76s to AAA·+22.96s to Sectionals | 2026-07-26 | 2026 ISI LC 10&U Age Group Championshipsvenue |
| 50 Butterfly | LCM | 39.82 | A+0.33s to AA·+9.53s to Sectionals | 2026-07-25 | 2026 ISI LC 10&U Age Group Championshipsvenue |
| 100 Butterfly | LCM | 1:33.27 | A+0.68s to AA·+25.18s to Sectionals | 2026-07-26 | 2026 ISI LC 10&U Age Group Championshipsvenue |
Cuts are USA Swimming single-age motivational standards (B → AAAA) at age 10.
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 | 32.75 | flat | 200 Free Relay | 2026-07-19 | 2026 ISI Summer SCST Regional |
| 50 Freestyle | SCY | 35.61 | flying | 200 Free Relay (leg 3) | 2026-03-01 | 2026 Winter ISI Regionals- BSC |
| 50 Breaststroke | SCY | 46.42 | flying | 200 Medley Relay (leg 2) | 2026-02-28 | 2026 Winter ISI Regionals- BSC |
| 50 Butterfly | SCY | 35.02 | flying | 200 Medley Relay (leg 3) | 2026-07-18 | 2026 ISI Summer SCST Regional |
| 50 Freestyle | LCM | 38.15 | flying | 200 Free Relay (leg 2) | 2026-07-25 | 2026 ISI LC 10&U Age Group Championships |
| 50 Breaststroke | LCM | 46.77 | flying | 200 Medley Relay (leg 2) | 2026-07-26 | 2026 ISI LC 10&U Age Group Championships |
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 10 & under · SCY
2841 points (4/5 events — incomplete)
| Event | Time | Points |
|---|---|---|
| 100 BK SCY | 1:20.12 | 683 |
| 100 BR SCY | 1:28.60 | 741 |
| 100 FL SCY | 1:17.82 | 755 |
| 200 IM SCY | 2:54.55 | 662 |
| 200 FR SCY | — | 0 |
IMR 10 & under · SCY
3014 points (5/5 events)
| Event | Time | Points |
|---|---|---|
| 100 FR SCY | 1:24.98 | 384 |
| 50 BK SCY | 39.28 | 571 |
| 50 BR SCY | 39.92 | 789 |
| 50 FL SCY | 34.58 | 740 |
| 100 IM SCY | 1:27.72 | 530 |
Scored against AAAA motivational base times: ordering is exact, absolute points run ~25% above the official USA Swimming scale.
PR splits
100 Freestyle SCY 1:24.98
Front half 39.78s · back half 45.20s
500 Freestyle SCY 8:00.46
Front half 232.58s · back half 247.88s
100 Backstroke SCY 1:20.12
Front half 38.85s · back half 41.27s
100 Breaststroke SCY 1:28.60
Front half 40.80s · back half 47.80s
100 Butterfly SCY 1:17.82
Front half 35.20s · back half 42.62s
200 Individual Medley SCY 2:54.55
Front half 80.26s · back half 94.29s
100 Freestyle LCM 1:40.80
Front half 46.10s · back half 54.70s
100 Backstroke LCM 1:31.03
Front half 43.21s · back half 47.82s
100 Breaststroke LCM 1:42.95
Front half 46.92s · back half 56.03s
100 Butterfly LCM 1:33.27
Front half 41.27s · back half 52.00s
Swim history
Every recorded swim, newest first
| Date | Event | Course | Time | Age | Round | Meet |
|---|
Individual swims with a recorded date and time — including disqualifications — plus reconstructed relay legs (marked). Assembled in the browser from this page’s data.
Progression
Faster times are higher. One card per event, all courses & history.