Mahasatya Janczak

Born : 1974 Cat. M50 Ultrarunner since 2014

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

119

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 ?

Bulgaria

Czechia

United Kingdom

United States

31,4%

Rank quotient ?This runner's calculation uses 12 eligible race(s): Σ(rank − 1) = 116; Σ finishers = 369. 116 / 369 × 100 = 31.44%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed12

Km — ultra races14 986 km

> 100 km12

> 160 km11

> 200 km8

> 24h7

> 48h3

Longest race4 989,0 km

29th Self-Transcendence 3100 Mile Race — 30/8/2025

Km per year (ultra races)

1 507

2022

4 989

2023

2024

4 989

2025

2026

Race types (share of distance)

Road100,0%

Wins & podiums (ultra)

🏆 Win1

🏆 Win M2

🏅 Top 33

🏅 Top 3 M4

Longest winning streak1

Current streak1

Records

24 h185,78 km 48 h286,27 km 6 d589,66 km

HISTORY

12 race(s) · 29 split(s) nested

Date		Race	Perf.	Rk
2025
30.08	3100mi	29th Self-Transcendence 3100 Mile Race	0:00:00 h	1 🏆
30.08	6d	29th Self-Transcendence 3100 Mile Race - 6d Split	591.272 km	6
30.08	10d	29th Self-Transcendence 3100 Mile Race - 10d Split	977.032 km	7
30.08	1000km	29th Self-Transcendence 3100 Mile Race - 1000km Split	10d 09:47:00 h	6
30.08	1000mi	29th Self-Transcendence 3100 Mile Race - 1000mi Split	16d 09:31:18 h	5
2023
30.08	3100mi	27th Self-Transcendence 3100 Mile Race	0:00:00 h	5
30.08	6d	27th Self-Transcendence 3100 Mile Race - 6d Split	629.275 km	4
30.08	10d	27th Self-Transcendence 3100 Mile Race - 10d Split	986.700 km	6
30.08	1000km	27th Self-Transcendence 3100 Mile Race - 1000km Split	10d 02:51:28 h	4
30.08	1000mi	27th Self-Transcendence 3100 Mile Race - 1000mi Split	16d 00:23:03 h	4
2022
17.09	24h	31st Self-Transcendence 24 h Track Race Tooting Bec	185.779 km	8
17.09	50km	31st Self-Transcendence 24 h Track Race Tooting Bec - 50km split	5:12:08 h	15
17.09	100km	31st Self-Transcendence 24 h Track Race Tooting Bec - 100km split	11:37:52 h	16
17.09	100mi	31st Self-Transcendence 24 h Track Race Tooting Bec - 100mi split	20:39:29 h	14
22.07	48h	Self-Transcendence Race 48h Kladno	286.265 km	6
07.06	10d	Sri Chinmoy 10 Day Race 2022 Sofia	1035.420 km	2 🥈
2019
22.04	10d	24th Sri Chinmoy 10 Day Race	1017.105 km	6
22.04	48h	24th Sri Chinmoy 10 Day Race - 48h Split	240.757 km	7
22.04	6d	24th Sri Chinmoy 10 Day Race - 6d Split	646.312 km	3 🥉
2018
21.04	6d	21st Sri Chinmoy 6 Day Race	589.663 km	3 🥉
21.04	24h	21st Sri Chinmoy 6 Day Race - 24h Split	106.860 km	7
21.04	48h	21st Sri Chinmoy 6 Day Race - 48h Split	205.996 km	4
2016
17.09	24h	26th Self-Transcendence 24 Hour Track Race Tooting Bec	165.876 km	22
17.09	50km	26th Self-Transcendence 24 Hour Track Race Tooting Bec - 50km Split	5:28:00 h	25
17.09	100km	26th Self-Transcendence 24 Hour Track Race Tooting Bec - 100km Split	12:29:00 h	24
17.09	100mi	26th Self-Transcendence 24 Hour Track Race Tooting Bec - 100mi Split	22:43:40 h	21
19.04	10d	21st Sri Chinmoy 10 Day Race	923.763 km	16
19.04	48h	21st Sri Chinmoy 10 Day Race - 48h Split	210.824 km	20
19.04	6d	21st Sri Chinmoy 10 Day Race - 6d Split	558.442 km	17
2015
19.09	24h	25th Self-Transcendence 24 Hour Track Race Tooting Bec	176.369 km	10
19.09	50km	25th Self-Transcendence 24 Hour Track Race Tooting Bec - 50km Split	5:37:13 h	26
19.09	100km	25th Self-Transcendence 24 Hour Track Race Tooting Bec - 100km Split	12:04:17 h	17
19.09	100mi	25th Self-Transcendence 24 Hour Track Race Tooting Bec - 100mi Split	21:54:38 h	12
23.04	6d	18th Sri Chinmoy 6 Day Race	489.240 km	20
23.04	24h	18th Sri Chinmoy 6 Day Race - 24h Split	86.904 km	28
23.04	48h	18th Sri Chinmoy 6 Day Race - 48h Split	157.715 km	27
2014
20.09	24h	24th Self-Transcendence 24 Hour Track Race Tooting Bec	138.444 km	29
20.09	6h	24th Self-Transcendence 24 Hour Track Race Tooting Bec - 6h Split	50.000 km	31
20.09	50km	24th Self-Transcendence 24 Hour Track Race Tooting Bec - 50km Split	5:59:40 h	32
20.09	12h	24th Self-Transcendence 24 Hour Track Race Tooting Bec - 12h Split	81.600 km	34
20.09	100km	24th Self-Transcendence 24 Hour Track Race Tooting Bec - 100km Split	16:17:40 h	35

Filter

Runner	Races in common

DUV-index calculation details

#	Date	Race	Credited km	DUV-index+
✓ 1	30/8/2025	29th Self-Transcendence 3100 Mile Race	4 988,97	×41
✓ 2	30/8/2023	27th Self-Transcendence 3100 Mile Race	4 988,97	×41
✓ 3	7/6/2022	Sri Chinmoy 10 Day Race 2022 Sofia	1 035,42	×8
✓ 4	22/4/2019	24th Sri Chinmoy 10 Day Race	1 017,11	×8
✓ 5	19/4/2016	21st Sri Chinmoy 10 Day Race	923,76	×7
✓ 6	21/4/2018	21st Sri Chinmoy 6 Day Race	589,66	×4
✓ 7	23/4/2015	18th Sri Chinmoy 6 Day Race	489,24	×4
✓ 8	22/7/2022	Self-Transcendence Race 48h Kladno	286,27	×2
✓ 9	17/9/2022	31st Self-Transcendence 24 h Track Race Tooting Bec	185,78	×1
✓ 10	19/9/2015	25th Self-Transcendence 24 Hour Track Race Tooting Bec	176,37	×1
✓ 11	17/9/2016	26th Self-Transcendence 24 Hour Track Race Tooting Bec	165,88	×1
✓ 12	20/9/2014	24th Self-Transcendence 24 Hour Track Race Tooting Bec	138,44	×1