In-seong JEONG
In-seong JEONG is a South Korea relay runner. He competes primarily in the 4x400Metre.
His personal bests include 3:39.21 in the 4x400Metre. He is currently active on the international athletics circuit, representing South Korea.
2025 season best3:39.21Oct 21, 2025 · Busan Asiad Stadium, Busan
Last competition106th National Sports Festival, Busan Asiad Stadium, BusanOct 21, 2025 · 3:39.21
As of Nov 14, 2026: 2025 season best 3:39.21 (Oct 21, 2025, Busan Asiad Stadium, Busan (KOR)) · Last competition: 106th National Sports Festival, Busan Asiad Stadium, Busan, Oct 21, 2025, 3:39.21
Personal bests
DisciplineResultAll-time
4x400MetreBusan 20253:39.21–
Progression
| Season | Discipline | Result | Wind | Date | Competitions |
|---|---|---|---|---|---|
| 2025 | 4x400Metre | 3:39.21 | – | Oct 21, 2025 | 106th National Sports Festival, Busan Asiad Stadium, Busan |