Swimmer profile
Mayumi So
Female10 & UnderRockford Marlins Swim ClubIL · CENTRAL
SeasonUSA Swimming season runs Sept – Aug
Event
2023–24
2024–25
2025–26
50 Free LCM
48.38
46.03
▲ 2.35
37.76
▲ 8.27
100 Free LCM
1:49.00
1:36.55
▲ 12.45
1:24.47
▲ 12.08
200 Free LCM
—
3:23.95
3:05.38
▲ 18.57
400 Free LCM
—
7:09.98
6:28.65
▲ 41.33
50 Back LCM
56.54
52.95
▲ 3.59
43.05
▲ 9.90
100 Back LCM
—
1:55.92
1:33.57
▲ 22.35
50 Breast LCM
1:03.01
56.34
▲ 6.67
48.04
▲ 8.30
100 Breast LCM
2:25.68
2:02.90
▲ 22.78
1:40.69
▲ 22.21
50 Fly LCM
58.63
45.86
▲ 12.77
40.52
▲ 5.34
100 Fly LCM
—
1:45.83
1:35.30
▲ 10.53
200 IM LCM
—
3:48.29
3:21.89
▲ 26.40
Improvement<0.5s0.5–2s2–5s5s+Slower
📊 All Attempts by Event
Chronological history of every recorded swim. Click an event to expand its attempt list.