swimstats

Serena Zhao

Fage 16BDGU300BATS

162 plausible swims · 30 meets · 2020-03-06 → 2026-07-12

Personal records

EventCourseBest CutDateMeet
50 Freestyle SCY 26.36 A+0.07s to AA·+1.47s to Sectionals 2024-03-02 2024 Gulf 13 & Over Champs (SHRK)slow pool
100 Freestyle SCY 57.08 A+0.09s to AA·+2.99s to Sectionals 2024-12-08 2024 Gulf Age Group Championshipsvenue
200 Freestyle SCY 2:06.29 A+3.60s to AA·+9.60s to Sectionals 2024-03-02 2024 Gulf 13 & Over Champs (SHRK)slow pool
500 Freestyle SCY 5:51.16 BB+6.07s to A·+41.27s to Sectionals 2024-10-18 BATS 2024 October Invitevenue
1000 Freestyle SCY 12:13.53 BB+15.04s to A·+83.04s to Sectionals 2024-01-14 2024 LSST January Frosty Open Meetvenue
50 Backstroke SCY 30.46 BB+0.17s to A·+1.87s to Sectionals 2024-03-01 2024 Gulf 13 & Over Champs (SHRK)slow pool
100 Backstroke SCY 1:03.50 A+1.91s to AA·+2.71s to Sectionals 2024-03-03 2024 Gulf 13 & Over Champs (SHRK)slow pool
200 Backstroke SCY 2:17.47 A+3.98s to AA·+4.18s to Sectionals 2025-03-01 2025 Gulf 13 & Over Champs (PEAK)fast pool
50 Breaststroke SCY 34.88 A+0.99s to AA·+1.29s to Sectionals 2024-03-01 2024 Gulf 13 & Over Champs (SHRK)slow pool
100 Breaststroke SCY 1:15.63 BB+1.44s to A·+4.74s to Sectionals 2025-03-01 2025 Gulf 13 & Over Champs (PEAK)fast pool
200 Breaststroke SCY 2:43.05 BB+2.36s to A·+6.76s to Sectionals 2024-09-28 Texas Elite IMX Invite 2024venue
50 Butterfly SCY 29.53 A+0.74s to AA·+2.14s to Sectionals 2025-01-01 Central Swim Houston
100 Butterfly SCY 1:04.80 BB+0.71s to A·+5.71s to Sectionals 2024-12-07 2024 Gulf Age Group Championshipsvenue
200 Butterfly SCY 2:28.41 BB+5.82s to A·+16.22s to Sectionals 2024-09-29 Texas Elite IMX Invite 2024venue
200 Individual Medley SCY 2:20.69 A+3.30s to AA·+8.10s to Sectionals 2024-12-08 2024 Gulf Age Group Championshipsvenue
400 Individual Medley SCY 4:59.30 A+5.11s to AA·+20.61s to Sectionals 2024-12-06 2024 Gulf Age Group Championshipsvenue
50 Freestyle LCM 30.03 A+0.14s to AA·+1.64s to Sectionals 2024-05-04 2024 AQUA & PACE May LC Openvenue
100 Freestyle LCM 1:07.11 A+2.62s to AA·+5.82s to Sectionals 2024-07-14 2024 Long Course Gulf Age Group Championshipsvenue
200 Freestyle LCM 2:23.14 A+3.85s to AA·+11.05s to Sectionals 2025-05-16 2025 Fleet Summer Classic
400 Freestyle LCM 5:23.84 BB+16.15s to A·+45.05s to Sectionals 2024-05-24 CATS Spring into Summer Openvenue
50 Backstroke LCM 35.40 BB+0.01s to A·+2.51s to Sectionals 2024-05-24 CATS Spring into Summer Openvenue
100 Backstroke LCM 1:14.60 A+2.71s to AA·+4.81s to Sectionals 2024-06-29 2024 Fleet Last Chance Meetvenue
200 Backstroke LCM 2:40.94 A+6.65s to AA·+8.95s to Sectionals 2024-05-26 CATS Spring into Summer Openvenue
50 Breaststroke LCM 41.26 BB+1.07s to A·+2.97s to Sectionals 2025-06-06 2025 BATS June Invite
100 Breaststroke LCM 1:28.61 BB+3.52s to A·+8.02s to Sectionals 2025-01-01 Central Swim Houston
50 Butterfly LCM 33.51 A+1.32s to AA·+2.22s to Sectionals 2026-04-11 2026 TEST Spring Splash
100 Butterfly LCM 1:16.79 BB+4.40s to A·+9.40s to Sectionals 2024-06-29 2024 Fleet Last Chance Meetvenue
200 Butterfly LCM 2:57.22 B+2.53s to BB·+25.93s to Sectionals 2025-05-16 2025 Fleet Summer Classic
200 Individual Medley LCM 2:30.93 AA+0.24s to AAA·Sectionals ✓+4.74s to Futures 2025-06-27 2025 Fleet Last Chance
400 Individual Medley LCM 5:59.16 BB+9.47s to A·+39.47s to Sectionals 2025-06-06 2025 BATS June Invite

Cuts are USA Swimming single-age motivational standards (B → AAAA) at age 16.

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.

IMX / IMR

IMX 15-16 · SCY

3933 points (6/6 events)

EventTime Points
500 FR SCY 5:51.16 628
200 BK SCY 2:17.47 693
200 BR SCY 2:43.05 626
200 FL SCY 2:28.41 588
200 IM SCY 2:20.69 694
400 IM SCY 4:59.30 704

IMR 15-16 · LCM

3361 points (5/5 events)

EventTime Points
200 FR LCM 2:23.14 696
100 BK LCM 1:14.60 667
100 BR LCM 1:28.61 582
100 FL LCM 1:16.79 559
200 IM LCM 2:30.93 857

Scored against AAAA motivational base times: ordering is exact, absolute points run ~25% above the official USA Swimming scale.

PR splits

100 Freestyle SCY 57.08 RT 0.43s

27.38
29.70

Front half 27.38s · back half 29.70s

200 Freestyle SCY 2:06.29

30.09
32.38
32.62
31.20

Front half 62.47s · back half 63.82s

500 Freestyle SCY 5:51.16

29.54
32.64
34.54
35.48
35.97
36.69
36.99
36.65
36.64
36.02

Front half 168.17s · back half 182.99s

1000 Freestyle SCY 12:13.53

31.85
35.10
36.21
36.13
36.59
36.89
37.24
37.34
37.59
36.90
37.06
37.71
36.92
37.18
37.50
37.70
37.55
36.94
37.01
36.12

Front half 361.84s · back half 371.69s

100 Backstroke SCY 1:03.50

31.41
32.09

Front half 31.41s · back half 32.09s

200 Backstroke SCY 2:17.47

32.30
34.61
35.54
35.02

Front half 66.91s · back half 70.56s

100 Breaststroke SCY 1:15.63

36.44
39.19

Front half 36.44s · back half 39.19s

200 Breaststroke SCY 2:43.05

37.02
41.48
42.49
42.06

Front half 78.50s · back half 84.55s

100 Butterfly SCY 1:04.80 RT 0.72s

30.17
34.63

Front half 30.17s · back half 34.63s

200 Butterfly SCY 2:28.41

32.51
36.87
39.99
39.04

Front half 69.38s · back half 79.03s

200 Individual Medley SCY 2:20.69 RT 0.47s

30.78
35.97
41.05
32.89

Front half 66.75s · back half 73.94s

400 Individual Medley SCY 4:59.30 RT 0.68s

30.83
35.86
37.74
37.76
43.37
44.26
35.86
33.62

Front half 142.19s · back half 157.11s

400 Freestyle LCM 5:23.84

35.56
39.56
41.08
41.24
41.90
41.63
42.21
40.66

Front half 157.44s · back half 166.40s

100 Backstroke LCM 1:14.60

36.23
38.37

Front half 36.23s · back half 38.37s

200 Backstroke LCM 2:40.94

38.45
40.36
41.22
40.91

Front half 78.81s · back half 82.13s

100 Butterfly LCM 1:16.79

34.63
42.16

Front half 34.63s · back half 42.16s

Reaction time

fastest 0.43s average 0.568s slowest 0.72s 5 electronic starts

Start reaction over time faster starts higher

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
DateEventCourse TimeAge RoundMeet

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.

50 Freestyle SCY 26.36 15 swims
100 Freestyle SCY 57.08 10 swims
200 Freestyle SCY 2:06.29 6 swims
500 Freestyle SCY 5:51.16 1 swim
1000 Freestyle SCY 12:13.53 1 swim
50 Backstroke SCY 30.46 1 swim
100 Backstroke SCY 1:03.50 11 swims
200 Backstroke SCY 2:17.47 13 swims
50 Breaststroke SCY 34.88 2 swims
100 Breaststroke SCY 1:15.63 8 swims
200 Breaststroke SCY 2:43.05 3 swims
50 Butterfly SCY 29.53 1 swim
100 Butterfly SCY 1:04.80 7 swims
200 Butterfly SCY 2:28.41 1 swim
200 Individual Medley SCY 2:20.69 6 swims
400 Individual Medley SCY 4:59.30 3 swims
50 Freestyle LCM 30.03 14 swims
100 Freestyle LCM 1:07.11 8 swims
200 Freestyle LCM 2:23.14 5 swims
400 Freestyle LCM 5:23.84 1 swim
50 Backstroke LCM 35.40 3 swims
100 Backstroke LCM 1:14.60 13 swims
200 Backstroke LCM 2:40.94 8 swims
50 Breaststroke LCM 41.26 2 swims
100 Breaststroke LCM 1:28.61 3 swims
50 Butterfly LCM 33.51 2 swims
100 Butterfly LCM 1:16.79 4 swims
200 Butterfly LCM 2:57.22 1 swim
200 Individual Medley LCM 2:30.93 8 swims
400 Individual Medley LCM 5:59.16 1 swim