I-Hsiung (張義雄) Chang

Born : 1969 Cat. M55 Ultrarunner since 2016

DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.

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

Countries visited ?

Taiwan

18,5%

Rank quotient ?This runner's calculation uses 70 eligible race(s): Σ(rank − 1) = 2 476; Σ finishers = 13 398. 2 476 / 13 398 × 100 = 18.48%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed71

Km — ultra races5 790 km

> 100 km9

Longest race122,4 km

8th National Taipei University 12H Ultra Marathon — 13/5/2023

Km per year (ultra races)

360

2022

984

2023

919

2024

865

2025

658

2026

Race types (share of distance)

Road98,9%

Stage1,1%

Wins & podiums (ultra)

🏆 Win0

🏆 Win M0

🏅 Top 37

🏅 Top 3 M7

Longest winning streak0

Current streak0

Records

50 km5h33'25 100 km9h48'32 6 h65,48 km 12 h122,37 km

HISTORY

74 race(s) · 14 split(s) nested

Date		Race	Perf.	Rk
2026
12.09	100km	3rd Yizai Jincheng 100km	11:08:02 h	8
12.04	14h	10th National Taipei University 14H Ultra Marathon	101.558 km	13
11.04	100km	2nd Xuhai Ultra Marathon	10:36:02 h	3 🥉
21.03	50km	10th Beigan Ultramarathon	5:33:25 h	11
14.03	100km	15th Southern Cross-Island Highway 100 km Ultra Marathon	9:55:26 h	7
01.03	100km	9th Fencihu 100 km Ultra Run	12:26:27 h	28
06.02	50mi	15th Taipei 12hr Ultra Marathon Night Run - 50mi Split	8:39:09 h	7
06.02	100km	15th Taipei 12hr Ultra Marathon Night Run - 100km Split	10:55:47 h	5
06.02	6h	15th Taipei 12hr Ultra Marathon Night Run - 6h Split	59.796 km	6
06.02	12h	15th Taipei 12hr Ultra Marathon Night Run	106.304 km	7
2025
27.12	55km	9th Bei-yi Freeway Ultra Marathon	4:58:16 h	12
21.11	100km	14th Yilan Dongshan River 100km Ultra-Marathon Night Run	12:30:21 h	26
28.09	14h	1st Luzhu Ultra Marathon - 14h	101.280 km	19
20.09	100km	2nd Yizai Jincheng 100km	13:32:11 h	23
05.09	45.2k	1st Hehuanshan Ultra Run	5:18:38 h	65
30.08	45km	1st Taiwan Town and Country - Zhongliao	4:31:19 h	9
08.03	100km	14th Southern Cross-Island Highway 100 km Ultra Marathon	10:12:35 h	6
23.02	100km	8th Fencihu 100 km Ultra Run	12:33:49 h	63
21.02	12h	14th Taipei 12hr Ultra Marathon Night Run	100.989 km	7
21.02	6h	14th Taipei 12hr Ultra Marathon Night Run - 6h Split	61.125 km	4
21.02	50mi	14th Taipei 12hr Ultra Marathon Night Run - 50mi Split	7:57:55 h	3 🥉
21.02	100km	14th Taipei 12hr Ultra Marathon Night Run - 100km Split	10:13:26 h	3 🥉
02.02	62.5km	2nd Tour de Taiwan stage 10 - Jinlun to Fonggang Single	8:17:31 h	2 🥈
12.01	100km	11th Zhenxibao (Cinsbu) 100 km Ultramarathon	11:52:05 h	32
2024
22.12	100km	7th Shancheng 100 km Ultramarathon	9:48:32 h	7
22.11	100km	13th Yilan Dongshan River 100km Ultra-Marathon Night Run	10:06:26 h	6
21.09	100km	1st Yizai Jincheng 100km	10:53:23 h	15
28.04	12h	9th National Taipei University 12H Ultra Marathon	116.493 km	3 🥉
20.04	100km	1st Xuhai Ultra Marathon	10:16:09 h	6
09.03	100km	13th Southern Cross-Island Highway 100 km Ultra Marathon	10:51:55 h	9
03.03	100km	7th Fencihu 100 km Ultra Run	11:51:00 h	26
23.02	12h	13th Taipei 12hr Ultra Marathon Night Run	102.666 km	15
23.02	50km	13th Taipei 12hr Ultra Marathon Night Run - 50km Split	5:10:57 h	13
23.02	6h	13th Taipei 12hr Ultra Marathon Night Run - 6h Split	57.467 km	13
23.02	50mi	13th Taipei 12hr Ultra Marathon Night Run - 50mi Split	8:44:43 h	11
23.02	100km	13th Taipei 12hr Ultra Marathon Night Run - 100km Split	11:05:54 h	11
21.01	100km	10th Zhenxibao (Cinsbu) 100 km Ultramarathon	13:12:44 h	136
2023
24.12	100km	6th Shancheng 100 km Ultramarathon	10:00:04 h	12
20.10	100km	12th Yilan Dongshan River 100km Ultra-Marathon Night Run	10:17:21 h	3 🥉
17.09	100km	1st Huashan 100 KM	12:03:42 h	34
27.05	45.6km	1st Taiwan Town and Country - Waipu	5:34:55 h	36
13.05	12h	8th National Taipei University 12H Ultra Marathon	122.370 km	2 🥈
22.04	12h	8th Yizai Jincheng 12h Ultramarathon	111.754 km	4
11.03	100km	12th Southern Cross-Island Highway 100 km Ultra Marathon	10:20:44 h	8
26.02	100km	6th Fencihu 100 km Ultra Run	11:40:46 h	26
10.02	12h	12th Taipei 12hr Ultra Marathon Night Run	104.603 km	10
10.02	6h	12th Taipei 12hr Ultra Marathon Night Run - 6h Split	57.467 km	9
10.02	50mi	12th Taipei 12hr Ultra Marathon Night Run - 50mi Split	8:57:05 h	10
10.02	100km	12th Taipei 12hr Ultra Marathon Night Run - 100km Split	11:17:03 h	10
08.01	100km	9th Zhenxibao (Cinsbu) 100 km Ultramarathon	11:45:24 h	51
2022
25.12	100km	5th Shancheng 100 km Ultramarathon	10:00:14 h	23
18.11	100km	11th Yilan Dongshan River 100km Ultra-Marathon Night Run	9:55:52 h	2 🥈
18.09	100km	4th Shudder Sheipa Ultramarathon - 100km	11:49:51 h	16
12.02	6h	11th Taipei 6hr Ultra Marathon Saturday Midnight Run	60.333 km	3 🥉
12.02	50km	11th Taipei 6hr Ultra Marathon Saturday Midnight Run - 50km Split	5:00:34 h	4
2021
13.03	100km	10th Southern Cross-Island Highway 100 km Ultra Marathon	12:06:29 h	121
28.02	100km	4th Fencihu 100 km Ultra Run	13:36:08 h	125
31.01	6h	10th Taipei 6hr Ultra Marathon Sunday Run	46.575 km	24
2020
20.09	100km	3rd Shudder Sheipa Ultramarathon - 100km	11:50:33 h	10
09.02	6h	9th Taipei 6hr Ultra Marathon Sunday Run	45.225 km	32
08.02	6h	9th Taipei 6hr Ultra Marathon Saturday Run	65.475 km	2 🥈
08.02	50km	9th Taipei 6hr Ultra Marathon Saturday Run - 50km Split	4:33:28 h	2 🥈
08.02	6h	9th Taipei 6hr Ultra Marathon Saturday Midnight Run	49.950 km	32
19.01	100km	8th Zhenxibao (Cinsbu) 100 km Ultramarathon	12:26:46 h	79
2019
08.12	100km	3rd Shancheng 100 km Ultramarathon	10:37:23 h	24
11.10	53km	5th Jhen-wu-shan UltraMaraton	5:50:10 h	16
28.07	53km	1st Deep Feelings Ultra Run	6:26:59 h	18
14.07	45.8km	4th Lovers' Gorge Ultra Run	6:36:24 h	219
23.06	50km	1st North Dawu Mountain Ultra Marathon	6:47:01 h	112
09.06	100km	2nd Shudder Sheipa Ultramarathon - 100km	13:48:34 h	24
17.03	100km	2nd Fencihu 100 km Ultra Run	14:47:32 h	112
09.03	100km	9th Southern Cross-Island Highway 100 km Ultra Marathon	10:36:43 h	11
20.01	100km	7th Zhenxibao (Cinsbu) 100 km Ultramarathon	12:37:10 h	143
2018
04.11	6h	6th Kaohsiung 6h UltraMarathon Sunday Run	47.250 km	19
03.11	6h	6th Kaohsiung 6h UltraMarathon Saturday Run	57.750 km	12
03.11	50km	6th Kaohsiung 6h UltraMarathon Saturday Run - 50km Split	5:10:47 h	13
22.09	6h	3rd Doubang 6h Ultramarathon	48.640 km	56
01.09	56km	1st Tanya Shen Ultra Marathon - 56km	6:58:24 h	24
07.04	6h	5th Yizai Jincheng 6h Ultramarathon	51.200 km	48
03.03	50km	1st The Peach Blossom Land 50K	5:38:29 h	30
21.01	100km	6th Zhenxibao (Cinsbu) 100 km Ultramarathon	12:47:58 h	153
2017
03.12	45km	Decisive battle in Lan Yang	4:49:31 h	19
05.11	6h	5th Kaohsiung 6h UltraMarathon Sunday Run	47.250 km	23
04.11	6h	5th Kaohsiung 6h UltraMarathon Saturday Run	54.250 km	14
04.11	50km	5th Kaohsiung 6h UltraMarathon Saturday Run - 50km Split	5:30:53 h	14
06.08	46.5km	2nd Tianxishui Ultra Run	5:49:56 h	69
09.04	45.3km	2nd Kaohaiung Love Public Ultramarathon	5:33:36 h	132
2016
22.05	45.3km	1st Kaohaiung Love Public Ultramarathon	4:43:05 h	51

Filter

Runner	Races in common

DUV-index calculation details

#	Date	Race	Credited km	DUV-index+
✓ 1	13/5/2023	8th National Taipei University 12H Ultra Marathon	122,37	×2
✓ 2	28/4/2024	9th National Taipei University 12H Ultra Marathon	116,49	×2
✓ 3	22/4/2023	8th Yizai Jincheng 12h Ultramarathon	111,75	×2
✓ 4	6/2/2026	15th Taipei 12hr Ultra Marathon Night Run	106,30	×2
✓ 5	10/2/2023	12th Taipei 12hr Ultra Marathon Night Run	104,60	×1
✓ 6	23/2/2024	13th Taipei 12hr Ultra Marathon Night Run	102,67	×1
✓ 7	12/4/2026	10th National Taipei University 14H Ultra Marathon	101,56	×1
✓ 8	28/9/2025	1st Luzhu Ultra Marathon - 14h	101,28	×1
✓ 9	21/2/2025	14th Taipei 12hr Ultra Marathon Night Run	100,99	×1
✓ 10	12/9/2026	3rd Yizai Jincheng 100km	100,00	×1
✓ 11	11/4/2026	2nd Xuhai Ultra Marathon	100,00	×1
✓ 12	14/3/2026	15th Southern Cross-Island Highway 100 km Ultra Marathon	100,00	×1
✓ 13	1/3/2026	9th Fencihu 100 km Ultra Run	100,00	×1
✓ 14	21/11/2025	14th Yilan Dongshan River 100km Ultra-Marathon Night Run	100,00	×1
✓ 15	20/9/2025	2nd Yizai Jincheng 100km	100,00	×1
✓ 16	8/3/2025	14th Southern Cross-Island Highway 100 km Ultra Marathon	100,00	×1
✓ 17	23/2/2025	8th Fencihu 100 km Ultra Run	100,00	×1
✓ 18	12/1/2025	11th Zhenxibao (Cinsbu) 100 km Ultramarathon	100,00	×1
✓ 19	22/12/2024	7th Shancheng 100 km Ultramarathon	100,00	×1
✓ 20	22/11/2024	13th Yilan Dongshan River 100km Ultra-Marathon Night Run	100,00	×1
✓ 21	21/9/2024	1st Yizai Jincheng 100km	100,00	×1
✓ 22	20/4/2024	1st Xuhai Ultra Marathon	100,00	×1
✓ 23	9/3/2024	13th Southern Cross-Island Highway 100 km Ultra Marathon	100,00	×1
✓ 24	3/3/2024	7th Fencihu 100 km Ultra Run	100,00	×1
✓ 25	21/1/2024	10th Zhenxibao (Cinsbu) 100 km Ultramarathon	100,00	×1
✓ 26	24/12/2023	6th Shancheng 100 km Ultramarathon	100,00	×1
✓ 27	20/10/2023	12th Yilan Dongshan River 100km Ultra-Marathon Night Run	100,00	×1
✓ 28	17/9/2023	1st Huashan 100 KM	100,00	×1
✓ 29	11/3/2023	12th Southern Cross-Island Highway 100 km Ultra Marathon	100,00	×1
✓ 30	26/2/2023	6th Fencihu 100 km Ultra Run	100,00	×1
✓ 31	8/1/2023	9th Zhenxibao (Cinsbu) 100 km Ultramarathon	100,00	×1
✓ 32	25/12/2022	5th Shancheng 100 km Ultramarathon	100,00	×1
✓ 33	18/11/2022	11th Yilan Dongshan River 100km Ultra-Marathon Night Run	100,00	×1
✓ 34	18/9/2022	4th Shudder Sheipa Ultramarathon - 100km	100,00	×1
✓ 35	13/3/2021	10th Southern Cross-Island Highway 100 km Ultra Marathon	100,00	×1
✓ 36	28/2/2021	4th Fencihu 100 km Ultra Run	100,00	×1
✓ 37	20/9/2020	3rd Shudder Sheipa Ultramarathon - 100km	100,00	×1
✓ 38	19/1/2020	8th Zhenxibao (Cinsbu) 100 km Ultramarathon	100,00	×1
✓ 39	8/12/2019	3rd Shancheng 100 km Ultramarathon	100,00	×1
✓ 40	9/6/2019	2nd Shudder Sheipa Ultramarathon - 100km	100,00	×1
✓ 41	17/3/2019	2nd Fencihu 100 km Ultra Run	100,00	×1
✓ 42	9/3/2019	9th Southern Cross-Island Highway 100 km Ultra Marathon	100,00	×1
✓ 43	20/1/2019	7th Zhenxibao (Cinsbu) 100 km Ultramarathon	100,00	×1
✓ 44	21/1/2018	6th Zhenxibao (Cinsbu) 100 km Ultramarathon	100,00	×1
✓ 45	8/2/2020	9th Taipei 6hr Ultra Marathon Saturday Run	65,48	×1
✓ 46	12/2/2022	11th Taipei 6hr Ultra Marathon Saturday Midnight Run	60,33	×1
✓ 47	3/11/2018	6th Kaohsiung 6h UltraMarathon Saturday Run	57,75	×1
✓ 48	1/9/2018	1st Tanya Shen Ultra Marathon - 56km	56,00	×1
✓ 49	27/12/2025	9th Bei-yi Freeway Ultra Marathon	55,00	×1
✓ 50	4/11/2017	5th Kaohsiung 6h UltraMarathon Saturday Run	54,25	×1
✓ 51	11/10/2019	5th Jhen-wu-shan UltraMaraton	53,00	×1
✓ 52	28/7/2019	1st Deep Feelings Ultra Run	53,00	×1
53	7/4/2018	5th Yizai Jincheng 6h Ultramarathon	51,20	—
54	21/3/2026	10th Beigan Ultramarathon	50,00	—
55	23/6/2019	1st North Dawu Mountain Ultra Marathon	50,00	—
56	3/3/2018	1st The Peach Blossom Land 50K	50,00	—
57	22/9/2018	3rd Doubang 6h Ultramarathon	48,64	—
58	4/11/2018	6th Kaohsiung 6h UltraMarathon Sunday Run	47,25	—
59	5/11/2017	5th Kaohsiung 6h UltraMarathon Sunday Run	47,25	—
60	31/1/2021	10th Taipei 6hr Ultra Marathon Sunday Run	46,58	—
61	6/8/2017	2nd Tianxishui Ultra Run	46,50	—
62	14/7/2019	4th Lovers' Gorge Ultra Run	45,80	—
63	27/5/2023	1st Taiwan Town and Country - Waipu	45,60	—
64	9/4/2017	2nd Kaohaiung Love Public Ultramarathon	45,30	—
65	22/5/2016	1st Kaohaiung Love Public Ultramarathon	45,30	—
66	9/2/2020	9th Taipei 6hr Ultra Marathon Sunday Run	45,23	—
67	30/8/2025	1st Taiwan Town and Country - Zhongliao	45,00	—
68	3/12/2017	Decisive battle in Lan Yang	45,00	—