Swimmer profile
Nina Mazereeuw
Female17-18Charles River AquaticsNE · EASTERN
SeasonUSA Swimming season runs Sept – Aug
Event
2018–19
2019–20
2020–21
2021–22
2022–23
2023–24
2024–25
2025–26
50 Free SCY
34.06
31.08
▲ 2.98
27.78
▲ 3.30
25.84
▲ 1.94
25.31
▲ 0.53
24.95
▲ 0.36
24.61
▲ 0.34
24.88
▼ 0.27
100 Free SCY
1:14.69
1:04.75
▲ 9.94
58.82
▲ 5.93
55.27
▲ 3.55
54.11
▲ 1.16
52.94
▲ 1.17
52.47
▲ 0.47
53.15
▼ 0.68
200 Free SCY
2:48.14
2:24.29
▲ 23.85
2:05.23
▲ 19.06
1:59.27
▲ 5.96
1:58.41
▲ 0.86
1:53.19
▲ 5.22
1:53.41
▼ 0.22
1:54.25
▼ 0.84
500 Free SCY
—
6:25.46
5:45.76
▲ 39.70
—
5:32.11
▲ 13.65
5:14.63
▲ 17.48
5:11.53
▲ 3.10
5:22.30
▼ 10.77
1000 Free SCY
—
—
—
11:58.67
11:50.50
▲ 8.17
10:53.44
▲ 57.06
10:56.03
▼ 2.59
10:57.02
▼ 0.99
1650 Free SCY
—
—
—
18:48.48
18:55.06
▼ 6.58
18:52.32
▲ 2.74
19:07.66
▼ 15.34
—
50 Back SCY
42.29
37.57
▲ 4.72
34.56
▲ 3.01
—
30.08
▲ 4.48
29.41
▲ 0.67
29.29
▲ 0.12
30.31
▼ 1.02
100 Back SCY
1:34.27
1:21.87
▲ 12.40
1:14.37
▲ 7.50
1:06.15
▲ 8.22
1:01.65
▲ 4.50
1:03.55
▼ 1.90
1:04.20
▼ 0.65
1:01.73
▲ 2.47
200 Back SCY
—
—
—
2:17.17
2:16.35
▲ 0.82
2:20.48
▼ 4.13
2:12.03
▲ 8.45
—
50 Breast SCY
44.02
38.17
▲ 5.85
36.24
▲ 1.93
—
—
—
33.48
▲ 2.76
—
100 Breast SCY
1:31.24
1:23.66
▲ 7.58
1:17.33
▲ 6.33
1:14.46
▲ 2.87
1:12.42
▲ 2.04
1:10.61
▲ 1.81
1:16.52
▼ 5.91
1:12.80
▲ 3.72
200 Breast SCY
—
2:59.67
2:49.23
▲ 10.44
2:38.35
▲ 10.88
—
2:32.46
▲ 5.89
2:49.71
▼ 17.25
2:41.24
▲ 8.47
50 Fly SCY
43.30
—
—
—
—
—
26.71
▲ 16.59
27.04
▼ 0.33
100 Fly SCY
—
—
1:07.46
1:01.07
▲ 6.39
1:01.04
▲ 0.03
1:00.70
▲ 0.34
58.08
▲ 2.62
59.11
▼ 1.03
200 Fly SCY
—
—
—
2:17.57
2:16.24
▲ 1.33
2:20.95
▼ 4.71
2:20.55
▲ 0.40
2:10.33
▲ 10.22
100 IM SCY
1:24.07
1:14.68
▲ 9.39
1:10.27
▲ 4.41
—
1:08.43
▲ 1.84
1:01.81
▲ 6.62
1:00.34
▲ 1.47
—
200 IM SCY
3:10.04
2:45.48
▲ 24.56
2:31.44
▲ 14.04
2:13.46
▲ 17.98
2:12.02
▲ 1.44
2:11.21
▲ 0.81
2:12.82
▼ 1.61
2:09.50
▲ 3.32
400 IM SCY
—
—
—
4:48.16
4:46.42
▲ 1.74
4:50.44
▼ 4.02
4:41.52
▲ 8.92
4:41.91
▼ 0.39
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.