Swimmer profile
Serena Zhao
Female15-16Houston Bridge BatsGU · SOUTHERN
SeasonUSA Swimming season runs Sept – Aug
Event
2017–18
2018–19
2019–20
2020–21
2021–22
2022–23
2023–24
2024–25
2025–26
50 Free SCY
—
35.69
29.34
▲ 6.35
29.06
▲ 0.28
27.24
▲ 1.82
27.10
▲ 0.14
26.36
▲ 0.74
26.47
▼ 0.11
26.42
▲ 0.05
100 Free SCY
—
1:18.18
1:06.09
▲ 12.09
1:02.43
▲ 3.66
58.81
▲ 3.62
58.56
▲ 0.25
58.26
▲ 0.30
57.08
▲ 1.18
58.04
▼ 0.96
200 Free SCY
—
3:03.97
2:26.93
▲ 37.04
2:14.90
▲ 12.03
2:07.79
▲ 7.11
2:07.07
▲ 0.72
2:05.56
▲ 1.51
2:08.73
▼ 3.17
2:08.75
▼ 0.02
500 Free SCY
—
—
6:15.95
5:53.80
▲ 22.15
5:29.77
▲ 24.03
5:35.54
▼ 5.77
5:38.69
▼ 3.15
5:51.16
▼ 12.47
—
1000 Free SCY
—
—
—
—
—
11:37.68
12:13.53
▼ 35.85
—
—
50 Back SCY
—
44.38
38.93
▲ 5.45
34.76
▲ 4.17
32.21
▲ 2.55
30.26
▲ 1.95
30.46
▼ 0.20
—
30.42
▲ 0.04
100 Back SCY
—
—
1:28.26
1:13.23
▲ 15.03
1:07.33
▲ 5.90
1:04.38
▲ 2.95
1:03.50
▲ 0.88
1:03.78
▼ 0.28
1:04.41
▼ 0.63
200 Back SCY
—
—
—
—
—
2:20.53
2:18.47
▲ 2.06
2:17.47
▲ 1.00
2:18.78
▼ 1.31
50 Breast SCY
1:00.55
45.34
▲ 15.21
38.84
▲ 6.50
36.32
▲ 2.52
34.07
▲ 2.25
34.92
▼ 0.85
34.88
▲ 0.04
35.29
▼ 0.41
35.57
▼ 0.28
100 Breast SCY
—
1:36.63
1:23.60
▲ 13.03
1:18.54
▲ 5.06
1:13.71
▲ 4.83
1:15.87
▼ 2.16
1:16.38
▼ 0.51
1:15.63
▲ 0.75
1:16.88
▼ 1.25
200 Breast SCY
—
—
—
2:47.12
2:40.04
▲ 7.08
2:48.39
▼ 8.35
2:44.47
▲ 3.92
2:43.05
▲ 1.42
—
50 Fly SCY
—
43.61
37.75
▲ 5.86
31.53
▲ 6.22
30.06
▲ 1.47
30.33
▼ 0.27
—
—
29.53
▲ 0.80
100 Fly SCY
—
1:39.98
1:25.47
▲ 14.51
1:11.67
▲ 13.80
1:08.70
▲ 2.97
1:07.46
▲ 1.24
1:07.31
▲ 0.15
1:04.80
▲ 2.51
1:06.59
▼ 1.79
200 Fly SCY
—
—
—
—
—
2:34.72
2:34.66
▲ 0.06
2:28.41
▲ 6.25
—
100 IM SCY
—
1:25.76
1:17.18
▲ 8.58
1:10.56
▲ 6.62
1:06.68
▲ 3.88
1:05.56
▲ 1.12
1:06.22
▼ 0.66
—
—
200 IM SCY
—
3:34.06
2:42.94
▲ 51.12
2:31.41
▲ 11.53
2:24.39
▲ 7.02
2:22.14
▲ 2.25
2:21.82
▲ 0.32
2:18.89
▲ 2.93
2:21.94
▼ 3.05
400 IM SCY
—
—
—
—
5:04.65
5:03.16
▲ 1.49
5:02.22
▲ 0.94
4:59.30
▲ 2.92
—
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.