Jeng-Ying (張振營) Chang
ID 463319
Born : 1968 Cat. M55 Ultrarunner since 2013 TPE
12
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
22
DUV-index+ ?Largest integer N such that the race distances provide at least N complete segments of N km in total. A single long race may therefore contribute several segments. See the DUV-Index tab for the detailed calculation. calculation details
2
Countries visited ?JPNJapanTPETaiwan
68,2%
Rank quotient ?This runner's calculation uses 13 eligible race(s): Σ(rank − 1) = 467; Σ finishers = 685. 467 / 685 × 100 = 68.18%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed21
Km — ultra races1 023 km
> 100 km1
Longest race102,8 km
11th Taipei 12hr Ultra Marathon — 12/2/2022

Km per year (ultra races)

103
1 race
2022
2023
225
2 races
2024
270
2025
270
7 races
2026

Race types (share of distance)

Road51,6%
Trail4,4%
Stage44,0%

Records

6 h56,70 km12 h102,77 km

HISTORY

21 race(s) · 2 stage(s) nested · 4 split(s) nested
DateRacePerf.Rk
2026
06.09 45km TPE1st Mt. Jiangziliao Ultra Run 7:17:34 h19
05.07 45km JPN1st Lake Kawaguchi and Saiko Ulra Run 6:44:35 h15
05.07 45km JPN1st Lake Kawaguchi and Saiko Ulra Run 8:10:15 h21
04.07 45km JPN1st Lake Motosu and Shoji Ultra Run 7:10:50 h8
21.06 45km TPE2nd Fengshan Youluopa Rabbit Ultra Run 8:10:15 h21
01.05 45km TPE1st Longyuan Anpingzhen Ultra Run 5:58:33 h7
26.04 45km TPE1st Laojie River Ultra Run 7:23:02 h9
2025
15.11 45km JPN1st Ibaraki Tochigi Ultra Run Stage 6 - Otani 6:49:25 h3 🥉
13.11 45km JPN1st Ibaraki Tochigi Ultra Run Stage 4 - Utsunomiya 6:53:16 h3 🥉
17.08 45km TPE1st Greater Taipei Metropolitan Area Stage 9 7:26:52 h13
17.04 45km JPN1st Seto Inland Sea Stage 5 - Kongofukuji Temple 6:41:12 h5
15.04 45km JPN1st Seto Inland Sea Stage 3 - Iwaya Enmyoji Temple 6:19:16 h2 🥈
13.04 45km JPN1st Seto Inland Sea Stage 1 - Onomichi Oyama 6:23:21 h10
2024
09–10.11 90km/2stages JPN1st Tokyo Ultra Run Stage Race 17:17:23 h9
07.11 45km JPN1st Aomori Ultra Run Stage 3 5:54:44 h7
05.11 45km JPN1st Aomori Ultra Run Stage 1 7:23:08 h3 🥉
21.07 45km TPE2nd Guandu Erziping Ultra Run 7:31:41 h14
2022
12.02 12h TPE11th Taipei 12hr Ultra Marathon 102.765 km15
2021
31.01 6h TPE10th Taipei 6hr Ultra Marathon Sunday Run 56.700 km7
2019
16.02 6h TPE8th Taipei 6hr Ultra Marathon Saturday Run 45.900 km56
2013
12.10 53km TPE2nd Jhen-wu-shan UltraMaraton 7:40:56 h279