Swimmer profile
Cj Achterkirchen
Male15-16Palo Alto Stanford AquaticsPC · WESTERN
SeasonUSA Swimming season runs Sept – Aug
Event
2021–22
2022–23
2023–24
2024–25
2025–26
50 Free LCM
34.65
31.26
▲ 3.39
28.39
▲ 2.87
27.47
▲ 0.92
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100 Free LCM
1:17.25
1:08.79
▲ 8.46
1:02.54
▲ 6.25
58.86
▲ 3.68
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200 Free LCM
—
2:32.45
—
2:10.03
▲ 22.42
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50 Back LCM
39.70
37.47
▲ 2.23
—
32.19
▲ 5.28
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100 Back LCM
1:30.09
1:18.07
▲ 12.02
1:12.63
▲ 5.44
1:08.34
▲ 4.29
1:10.77
▼ 2.43
200 Back LCM
3:07.68
2:47.58
▲ 20.10
2:36.82
▲ 10.76
2:28.96
▲ 7.86
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50 Breast LCM
53.24
—
—
—
—
100 Breast LCM
—
1:43.75
—
—
—
200 Breast LCM
4:09.43
—
—
—
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50 Fly LCM
41.13
—
—
—
—
100 Fly LCM
—
—
—
1:09.51
—
200 IM LCM
—
2:59.05
—
—
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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.