Swimmer profile
Alex Koo
Male17-18FASTIN · CENTRAL
SeasonUSA Swimming season runs Sept – Aug
Event
2015–16
2016–17
2017–18
2018–19
2019–20
2020–21
2021–22
2022–23
2023–24
2024–25
2025–26
50 Free LCM
54.31
43.76
▲ 10.55
39.12
▲ 4.64
32.58
▲ 6.54
—
28.41
▲ 4.17
28.21
▲ 0.20
24.96
▲ 3.25
24.25
▲ 0.71
23.93
▲ 0.32
23.82
▲ 0.11
100 Free LCM
—
—
1:27.48
1:11.25
▲ 16.23
1:07.62
▲ 3.63
1:01.29
▲ 6.33
57.97
▲ 3.32
55.44
▲ 2.53
53.38
▲ 2.06
53.21
▲ 0.17
52.71
▲ 0.50
200 Free LCM
—
—
3:10.70
2:37.03
▲ 33.67
—
2:14.46
▲ 22.57
2:08.04
▲ 6.42
2:03.92
▲ 4.12
1:57.23
▲ 6.69
1:58.06
▼ 0.83
2:00.27
▼ 2.21
400 Free LCM
—
—
—
—
—
4:48.02
4:45.08
▲ 2.94
4:21.67
▲ 23.41
4:14.23
▲ 7.44
4:19.29
▼ 5.06
4:23.93
▼ 4.64
800 Free LCM
—
—
—
—
—
—
—
9:28.79
—
9:23.70
▲ 5.09
—
1500 Free LCM
—
—
—
—
—
—
—
18:04.59
17:27.92
▲ 36.67
—
—
50 Back LCM
55.85
51.45
▲ 4.40
51.89
▼ 0.44
41.42
▲ 10.47
—
34.90
▲ 6.52
—
28.72
▲ 6.18
28.79
▼ 0.07
—
29.12
▼ 0.33
100 Back LCM
—
2:03.08
1:50.11
▲ 12.97
1:24.68
▲ 25.43
—
1:14.10
▲ 10.58
1:10.92
▲ 3.18
1:08.03
▲ 2.89
1:00.72
▲ 7.31
1:02.57
▼ 1.85
1:02.35
▲ 0.22
200 Back LCM
—
—
—
—
—
2:38.35
2:25.64
▲ 12.71
2:15.27
▲ 10.37
2:15.86
▼ 0.59
2:19.76
▼ 3.90
2:19.12
▲ 0.64
50 Breast LCM
—
1:15.19
1:04.84
▲ 10.35
53.15
▲ 11.69
—
43.18
▲ 9.97
—
—
—
—
—
100 Breast LCM
—
—
2:31.44
1:53.15
▲ 38.29
1:36.24
▲ 16.91
1:31.14
▲ 5.10
1:30.32
▲ 0.82
1:18.28
▲ 12.04
1:16.69
▲ 1.59
1:16.00
▲ 0.69
—
200 Breast LCM
—
—
—
—
—
—
—
2:52.50
2:49.77
▲ 2.73
2:49.07
▲ 0.70
—
50 Fly LCM
—
1:02.67
52.52
▲ 10.15
41.08
▲ 11.44
—
31.70
▲ 9.38
—
27.09
▲ 4.61
26.89
▲ 0.20
—
25.92
▲ 0.97
100 Fly LCM
—
—
1:57.41
1:24.02
▲ 33.39
—
1:06.50
▲ 17.52
1:06.79
▼ 0.29
59.56
▲ 7.23
58.45
▲ 1.11
56.95
▲ 1.50
56.76
▲ 0.19
200 Fly LCM
—
—
—
—
—
2:44.61
2:35.12
▲ 9.49
2:33.50
▲ 1.62
2:14.66
▲ 18.84
2:09.81
▲ 4.85
2:06.58
▲ 3.23
200 IM LCM
—
—
—
3:01.78
—
2:32.76
▲ 29.02
2:31.74
▲ 1.02
2:23.17
▲ 8.57
2:18.26
▲ 4.91
2:22.05
▼ 3.79
2:16.41
▲ 5.64
400 IM LCM
—
—
—
—
—
—
5:30.30
5:11.25
▲ 19.05
5:00.27
▲ 10.98
4:43.42
▲ 16.85
4:46.92
▼ 3.50
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.