Swimmer profile
Jonathan Kern
Male15-16Scarlet AquaticsNJ · EASTERN
SeasonUSA Swimming season runs Sept – Aug
Event
2017–18
2018–19
2021–22
2022–23
2023–24
2024–25
2025–26
50 Free LCM
51.52
43.55
▲ 7.97
30.71
▲ 12.84
28.36
▲ 2.35
25.70
▲ 2.66
25.44
▲ 0.26
25.64
▼ 0.20
100 Free LCM
—
1:42.07
1:05.12
▲ 36.95
1:01.26
▲ 3.86
56.54
▲ 4.72
55.55
▲ 0.99
55.81
▼ 0.26
200 Free LCM
—
—
2:25.51
2:17.16
▲ 8.35
2:07.38
▲ 9.78
2:01.27
▲ 6.11
1:59.93
▲ 1.34
400 Free LCM
—
—
5:15.97
4:41.38
▲ 34.59
—
4:21.78
▲ 19.60
4:22.89
▼ 1.11
800 Free LCM
—
—
10:39.75
10:16.14
▲ 23.61
—
9:08.30
▲ 67.84
9:10.61
▼ 2.31
1500 Free LCM
—
—
—
—
—
17:23.83
—
50 Back LCM
57.77
52.78
▲ 4.99
35.75
▲ 17.03
32.34
▲ 3.41
30.59
▲ 1.75
29.53
▲ 1.06
27.80
▲ 1.73
100 Back LCM
—
1:46.29
1:15.18
▲ 31.11
1:09.62
▲ 5.56
1:04.64
▲ 4.98
1:02.56
▲ 2.08
59.53
▲ 3.03
200 Back LCM
—
—
—
2:28.54
2:21.23
▲ 7.31
2:17.97
▲ 3.26
2:07.71
▲ 10.26
50 Breast LCM
—
1:01.09
44.88
▲ 16.21
—
—
34.37
▲ 10.51
—
100 Breast LCM
—
2:14.20
1:36.48
▲ 37.72
—
—
1:15.83
▲ 20.65
—
200 Breast LCM
—
—
—
—
2:58.80
2:46.20
▲ 12.60
—
50 Fly LCM
—
56.73
33.17
▲ 23.56
—
28.90
▲ 4.27
28.31
▲ 0.59
—
100 Fly LCM
—
—
1:13.64
1:07.71
▲ 5.93
1:03.00
▲ 4.71
1:01.22
▲ 1.78
1:03.61
▼ 2.39
200 Fly LCM
—
—
—
2:33.62
2:24.25
▲ 9.37
2:18.05
▲ 6.20
2:13.72
▲ 4.33
200 IM LCM
—
—
—
2:35.29
2:21.78
▲ 13.51
2:18.40
▲ 3.38
2:17.79
▲ 0.61
400 IM LCM
—
—
5:55.77
5:30.61
▲ 25.16
5:15.61
▲ 15.00
4:57.81
▲ 17.80
4:52.80
▲ 5.01
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.