swimIsaac Zheng
Personal records
| Event | Course | Best | Cut | Date | Meet |
|---|---|---|---|---|---|
| 50 Freestyle | SCY | 23.79 | BB+0.10s to A·+0.60s to Sectionals | 2024-03-22 | 2024 Northwest Region Age Group Regionalsvenue |
| 100 Freestyle | SCY | 53.74 | BB+1.75s to A·+2.75s to Sectionals | 2024-01-14 | 2024 PN VAST 47th Annual Washington Openvenue |
| 200 Freestyle | SCY | 2:01.53 | BB+6.64s to A·+9.74s to Sectionals | 2024-02-25 | 2024 PN February Age Group Invitationalvenue |
| 100 Backstroke | SCY | 1:05.22 | B+4.33s to BB·+9.73s to Sectionals | 2024-09-28 | 2024 PN IST Sockeye Sprintsvenue |
| 200 Backstroke | SCY | 2:29.33 | +4.94s to B·+28.04s to Sectionals | 2024-10-19 | 2024 PN IST Fall Openvenue |
| 50 Breaststroke | SCY | 29.03 | AA+1.04s to AAA·+2.74s to Futures | 2024-02-24 | 2024 PN February Age Group Invitationalvenue |
| 100 Breaststroke | SCY | 1:02.30 | A+0.71s to AA·Sectionals ✓+4.31s to Futures | 2024-03-22 | 2024 Northwest Region Age Group Regionalsvenue |
| 200 Breaststroke | SCY | 2:21.68 | BB+2.09s to A·+4.39s to Sectionals | 2024-03-23 | 2024 Northwest Region Age Group Regionalsvenue |
| 50 Butterfly | SCY | 27.88 | BB+1.39s to A·+4.99s to Futures | 2024-10-19 | 2024 PN IST Fall Openvenue |
| 100 Butterfly | SCY | 1:00.74 | BB+4.55s to A·+5.55s to Sectionals | 2024-01-13 | 2024 PN VAST 47th Annual Washington Openvenue |
| 200 Butterfly | SCY | 2:12.21 | BB+5.72s to A·+8.82s to Sectionals | 2022-12-02 | 2022 IE VAN Vandal Invitational |
| 100 Individual Medley | SCY | 1:01.98 | 2024-09-29 | 2024 PN IST Sockeye Sprintsvenue | |
| 200 Individual Medley | SCY | 2:12.59 | BB+5.80s to A·+8.60s to Sectionals | 2024-02-24 | 2024 PN February Age Group Invitationalvenue |
| 50 Freestyle | LCM | 27.69 | BB+0.30s to A·+0.70s to Sectionals | 2024-07-30 | WZ LCM Senior Champs 2024 |
| 100 Freestyle | LCM | 1:08.46 | B+3.27s to BB·+9.47s to Sectionals | 2024-06-22 | 2024 IST June Invtationalvenue |
| 200 Freestyle | LCM | 2:34.09 | +0.50s to B·+25.40s to Sectionals | 2022-06-05 | 2022 IE VS Apple Capitalslow pool |
| 400 Freestyle | LCM | 5:27.75 | +0.36s to B·+53.36s to Sectionals | 2024-05-17 | 2024 PN IST Sockeye Springtime Madnessvenue |
| 50 Backstroke | LCM | 45.66 | +8.37s to B·+17.77s to Futures | 2019-06-02 | 2019 IE VS Apple Capitalslow pool |
| 100 Backstroke | LCM | 1:19.58 | +1.39s to B·+14.39s to Sectionals | 2024-05-18 | 2024 PN IST Sockeye Springtime Madnessvenue |
| 50 Breaststroke | LCM | 37.12 | BB+2.03s to A·+6.23s to Futures | 2024-06-23 | 2024 IST June Invtationalvenue |
| 100 Breaststroke | LCM | 1:14.08 | A+2.49s to AA·+0.38s to Sectionals | 2024-08-01 | GroupA - WZ LCM Senior Champs 2024venue |
| 200 Breaststroke | LCM | 2:50.26 | BB+6.97s to A·+9.38s to Sectionals | 2024-07-20 | 2024 PN LC Senior Championshipsvenue |
| 50 Butterfly | LCM | 32.90 | B+0.61s to BB·+6.61s to Futures | 2024-06-22 | 2024 IST June Invtationalvenue |
| 100 Butterfly | LCM | 1:54.60 | +39.61s to B·+51.51s to Sectionals | 2019-05-31 | 2019 IE VS Apple Capitalslow pool |
| 200 Butterfly | LCM | 3:19.53 | +31.74s to B·+58.44s to Sectionals | 2022-06-04 | 2022 IE VS Apple Capitalslow pool |
| 200 Individual Medley | LCM | 2:46.61 | B+6.22s to BB·+21.92s to Sectionals | 2022-06-04 | 2022 IE VS Apple Capitalslow pool |
Cuts are USA Swimming single-age motivational standards (B → AAAA) at age 18.
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 | 23.14 | flying | 200 Free Relay (leg 3) | 2024-03-23 | 2024 Northwest Region Age Group Regionals |
| 100 Freestyle | SCY | 52.61 | flying | 400 Free Relay (leg 4) | 2024-03-21 | 2024 Northwest Region Age Group Regionals |
| 50 Breaststroke | SCY | 28.26 | flying | 200 Medley Relay (leg 2) | 2024-03-22 | 2024 Northwest Region Age Group Regionals |
| 100 Breaststroke | SCY | 1:02.53 | flying | 400 Medley Relay (leg 2) | 2024-03-23 | 2024 Northwest Region Age Group Regionals |
| 50 Freestyle | LCM | 27.63 | flying | 200 Free Relay (leg 3) | 2024-08-01 | GroupA - WZ LCM Senior Champs 2024 |
| 100 Freestyle | LCM | 1:02.69 | flying | 400 Free Relay (leg 4) | 2024-08-02 | WZ LCM Senior Champs 2024 |
| 100 Freestyle | LCM | 1:23.85 | flying | 400 Medley Relay (leg 4) | 2019-06-01 | 2019 IE VS Apple Capital |
| 50 Breaststroke | LCM | 28.16 | flying | 200 Medley Relay (leg 2) | 2024-07-30 | GroupA - WZ LCM Senior Champs 2024 |
| 100 Breaststroke | LCM | 1:15.15 | flying | 400 Medley Relay (leg 2) | 2024-08-03 | WZ LCM Senior Champs 2024 |
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 17-18 · SCY
2162 points (4/6 events — incomplete)
| Event | Time | Points |
|---|---|---|
| 200 BK SCY | 2:29.33 | 377 |
| 200 BR SCY | 2:21.68 | 633 |
| 200 FL SCY | 2:12.21 | 572 |
| 200 IM SCY | 2:12.59 | 580 |
| 500 FR SCY | — | 0 |
| 400 IM SCY | — | 0 |
IMR 17-18 · SCY
2813 points (5/5 events)
| Event | Time | Points |
|---|---|---|
| 200 FR SCY | 2:01.53 | 560 |
| 100 BK SCY | 1:05.22 | 421 |
| 100 BR SCY | 1:02.30 | 725 |
| 100 FL SCY | 1:00.74 | 527 |
| 200 IM SCY | 2:12.59 | 580 |
Scored against AAAA motivational base times: ordering is exact, absolute points run ~25% above the official USA Swimming scale.
PR splits
100 Freestyle SCY 53.74 RT 0.49s
Front half 25.70s · back half 28.04s
200 Freestyle SCY 2:01.53 RT 0.48s
Front half 57.94s · back half 63.59s
100 Backstroke SCY 1:05.22
Front half 31.34s · back half 33.88s
100 Breaststroke SCY 1:02.30 RT 0.63s
Front half 29.08s · back half 33.22s
200 Breaststroke SCY 2:21.68 RT 0.52s
Front half 67.33s · back half 74.35s
100 Butterfly SCY 1:00.74 RT 0.54s
Front half 28.19s · back half 32.55s
200 Butterfly SCY 2:12.21 split/total mismatch
100 Individual Medley SCY 1:01.98
Front half 30.03s · back half 31.95s
200 Individual Medley SCY 2:12.59 RT 0.59s
Front half 63.51s · back half 69.08s
200 Freestyle LCM 2:34.09
Front half 73.02s · back half 81.07s
400 Freestyle LCM 5:27.75 RT 0.65s
Front half 155.52s · back half 172.23s
100 Breaststroke LCM 1:14.08
Front half 34.39s · back half 39.69s
100 Butterfly LCM 1:54.60
Front half 50.60s · back half 64.00s
200 Butterfly LCM 3:19.53
Front half 84.01s · back half 115.52s
200 Individual Medley LCM 2:46.61
Front half 80.75s · back half 85.86s
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.
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.