swimstats

Chengmei Xin

Mage 13IEMRPNAGUABC

157 plausible swims · 29 meets · 2021-06-05 → 2026-05-24

Personal records

EventCourseBest CutDateMeet
50 Freestyle SCY 25.25 AA+0.86s to AAA·+2.06s to Sectionals 2026-03-07 2026 MR AGUA Last Chance Invitationalvenue
100 Freestyle SCY 54.87 AA+1.78s to AAA·+3.88s to Sectionals 2026-03-08 2026 MR AGUA Last Chance Invitationalvenue
200 Freestyle SCY 2:03.40 A+2.01s to AA·+11.61s to Sectionals 2026-02-01 2026 MR LIE Second Chance Invitationalvenue
500 Freestyle SCY 5:32.30 A+4.81s to AA·+29.61s to Sectionals 2026-01-30 2026 MR LIE Second Chance Invitationalvenue
50 Backstroke SCY 30.10 A+1.01s to AA·+6.41s to Futures 2025-11-09 2025 MR LIE Fall Classic Invitationalvenue
100 Backstroke SCY 1:03.13 A+2.04s to AA·+7.64s to Sectionals 2025-12-06 2025 MR NYS Holiday Classic Trials & Finalsvenue
200 Backstroke SCY 2:15.06 A+1.87s to AA·+13.77s to Sectionals 2026-03-15 2026 MR SC Junior Metropolitan Championshipsvenue
50 Breaststroke SCY 37.11 BB+2.42s to A·+10.82s to Futures 2025-02-07 2025 MR LIE Second Chance Invitational
100 Breaststroke SCY 1:14.89 BB+2.60s to A·+11.70s to Sectionals 2025-12-06 2025 MR NYS Holiday Classic Trials & Finalsvenue
200 Breaststroke SCY 2:36.74 A+6.45s to AA·+19.45s to Sectionals 2026-02-01 2026 MR LIE Second Chance Invitationalvenue
50 Butterfly SCY 29.64 A+1.15s to AA·+6.75s to Futures 2025-10-12 2025 MR AGUA Season Starter Invitationalvenue
100 Butterfly SCY 1:02.84 A+2.25s to AA·+7.65s to Sectionals 2026-01-18 2026 MR AGUA MLK Invitationalvenue
200 Butterfly SCY 2:20.75 A+4.96s to AA·+17.36s to Sectionals 2026-03-08 2026 MR AGUA Last Chance Invitationalvenue
100 Individual Medley SCY 1:04.82 2025-10-11 2025 MR AGUA Season Starter Invitationalvenue
200 Individual Medley SCY 2:18.97 A+3.68s to AA·+14.98s to Sectionals 2026-01-18 2026 MR AGUA MLK Invitationalvenue
400 Individual Medley SCY 4:59.00 A+9.21s to AA·+34.31s to Sectionals 2026-01-19 2026 MR AGUA MLK Invitationalvenue
50 Freestyle LCM 28.89 AA+0.90s to AAA·+1.90s to Sectionals 2026-05-23 2026 MR AGUA Memorial Day Invitationalfast pool
100 Freestyle LCM 1:02.76 AA+1.27s to AAA·+3.77s to Sectionals 2026-05-24 2026 MR AGUA Memorial Day Invitationalfast pool
200 Freestyle LCM 2:23.96 A+4.27s to AA·+15.27s to Sectionals 2026-05-16 2026 MR LIAC Spring Kickoff Invitationalvenue
50 Backstroke LCM 41.87 +0.68s to B·+13.98s to Futures 2024-06-30 2024 PN SMAC Summer Classic Invitationalvenue
100 Backstroke LCM 1:11.13 AA+2.44s to AAA·+5.94s to Sectionals 2026-05-23 2026 MR AGUA Memorial Day Invitationalfast pool
200 Backstroke LCM 2:54.72 BB+12.03s to A·+33.23s to Sectionals 2025-05-24 2025 MR AGUA Memorial Day Invitational
50 Breaststroke LCM 42.97 B+0.38s to BB·+12.08s to Futures 2025-05-10 2025 MR LIAC Spring Kickoff Invitational
100 Breaststroke LCM 1:23.25 A+3.36s to AA·+9.55s to Sectionals 2025-07-05 2025 MR LIAC Summer Splash Invitational
200 Breaststroke LCM 3:09.69 BB+6.80s to A·+28.81s to Sectionals 2025-07-18 2025 MR LC Junior Mets Championship
50 Butterfly LCM 33.52 BB+0.03s to A·+7.23s to Futures 2025-07-18 2025 MR LC Junior Mets Championship
100 Butterfly LCM 1:12.11 BB+0.02s to A·+9.02s to Sectionals 2026-05-24 2026 MR AGUA Memorial Day Invitationalfast pool
200 Individual Medley LCM 2:37.22 A+0.83s to AA·+12.53s to Sectionals 2026-05-16 2026 MR LIAC Spring Kickoff Invitationalvenue

Cuts are USA Swimming single-age motivational standards (B → AAAA) at age 13.

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

LegCourseTime StartRelayDateMeet
100 Freestyle SCY 54.27 flying 400 Free Relay (leg 2) 2026-03-13 2026 MR SC Junior Metropolitan 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 13-14 · SCY

3687 points (6/6 events)

EventTime Points
500 FR SCY 5:32.30 659
200 BK SCY 2:15.06 633
200 BR SCY 2:36.74 586
200 FL SCY 2:20.75 583
200 IM SCY 2:18.97 619
400 IM SCY 4:59.00 607

IMR 13-14 · LCM

3159 points (5/5 events)

EventTime Points
200 FR LCM 2:23.96 623
100 BK LCM 1:11.13 687
100 BR LCM 1:23.25 601
100 FL LCM 1:12.11 584
200 IM LCM 2:37.22 664

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

PR splits

100 Freestyle SCY 54.87

26.34
28.53

Front half 26.34s · back half 28.53s

200 Freestyle SCY 2:03.40

28.11
31.40
32.62
31.27

Front half 59.51s · back half 63.89s

500 Freestyle SCY 5:32.30

28.86
32.73
33.71
34.28
34.76
34.15
33.97
34.30
33.46
32.08

Front half 164.34s · back half 167.96s

100 Backstroke SCY 1:03.13

30.38
32.75

Front half 30.38s · back half 32.75s

200 Backstroke SCY 2:15.06

31.11
34.82
35.91
33.22

Front half 65.93s · back half 69.13s

100 Breaststroke SCY 1:14.89

35.46
39.43

Front half 35.46s · back half 39.43s

200 Breaststroke SCY 2:36.74

36.37
39.51
40.25
40.61

Front half 75.88s · back half 80.86s

100 Butterfly SCY 1:02.84

29.59
33.25

Front half 29.59s · back half 33.25s

200 Butterfly SCY 2:20.75

31.34
36.34
37.10
35.97

Front half 67.68s · back half 73.07s

100 Individual Medley SCY 1:04.82

30.41
34.41

Front half 30.41s · back half 34.41s

200 Individual Medley SCY 2:18.97

31.85
35.36
40.23
31.53

Front half 67.21s · back half 71.76s

400 Individual Medley SCY 4:59.00

32.06
38.05
37.40
37.24
43.18
42.70
34.74
33.63

Front half 144.75s · back half 154.25s

100 Freestyle LCM 1:02.76

29.75
33.01

Front half 29.75s · back half 33.01s

200 Freestyle LCM 2:23.96

33.79
36.17
37.59
36.41

Front half 69.96s · back half 74.00s

100 Backstroke LCM 1:11.13

34.28
36.85

Front half 34.28s · back half 36.85s

200 Backstroke LCM 2:54.72

38.22
85.34
128.60
166.56
41.43
86.21
132.80
174.72

200 Breaststroke LCM 3:09.69

41.91
86.96
42.16
90.28
140.07
189.69

50 Butterfly LCM 33.52 split/total mismatch

36.10
39.13

Front half 36.10s · back half -2.58s

100 Butterfly LCM 1:12.11

33.49
38.62

Front half 33.49s · back half 38.62s

200 Individual Medley LCM 2:37.22

34.35
41.40
46.28
35.19

Front half 75.75s · back half 81.47s

Reaction time

fastest 0.38s average 0.632s slowest 0.86s 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 25.25 9 swims
100 Freestyle SCY 54.87 10 swims
200 Freestyle SCY 2:03.40 8 swims
500 Freestyle SCY 5:32.30 2 swims
50 Backstroke SCY 30.10 5 swims
100 Backstroke SCY 1:03.13 11 swims
200 Backstroke SCY 2:15.06 4 swims
50 Breaststroke SCY 37.11 2 swims
100 Breaststroke SCY 1:14.89 10 swims
200 Breaststroke SCY 2:36.74 6 swims
50 Butterfly SCY 29.64 5 swims
100 Butterfly SCY 1:02.84 5 swims
200 Butterfly SCY 2:20.75 4 swims
100 Individual Medley SCY 1:04.82 5 swims
200 Individual Medley SCY 2:18.97 9 swims
400 Individual Medley SCY 4:59.00 1 swim
50 Freestyle LCM 28.89 7 swims
100 Freestyle LCM 1:02.76 6 swims
200 Freestyle LCM 2:23.96 5 swims
50 Backstroke LCM 41.87 5 swims
100 Backstroke LCM 1:11.13 4 swims
200 Backstroke LCM 2:54.72 3 swims
50 Breaststroke LCM 42.97 4 swims
100 Breaststroke LCM 1:23.25 6 swims
200 Breaststroke LCM 3:09.69 1 swim
50 Butterfly LCM 33.52 7 swims
100 Butterfly LCM 1:12.11 7 swims
200 Individual Medley LCM 2:37.22 4 swims