Men's marathon world record improved 31.83% over 118 years
Endurance Track, AI-assisted writing · · updated
From 1908 to 2026, the officially recognized men’s marathon world record dropped from 2:55:18.4 to 1:59:30, a total gain of 3,348.4 seconds (31.83%) and a pace cut from 4:09 per kilometer to just under 2:50 per kilometer [1]. The biggest single-decade gain came in the 1950s, but the 2020s are already matching the previous decade’s speed-up in under seven years [1]. This article breaks down the pattern of progress, decade by decade, with figures from our own calculation as of 30 October 2026 [1].
The shape of progress: a century in numbers
Our own calculation (2026-10-30) took the men's marathon world record on the first day of each decade from 1910-01-01, using marks recognised by IAAF/World Athletics and ARRS [1]. For each mark, we calculated the pace per kilometer and how much faster the record had become in the previous ten years [1].
| Decade | Record time | Pace/km | Change vs. 10 years earlier |
|---|---|---|---|
| 1910 | 2:40:34.2 | 3:48.3 | – |
| 1920 | 2:36:06.6 | 3:42.0 | 267.6 s (2.78%) |
| 1930 | 2:29:01.8 | 3:31.9 | 424.8 s (4.54%) |
| 1940 | 2:26:14 | 3:27.9 | 167.8 s (1.88%) |
| 1950 | 2:26:14 | 3:27.9 | 0 s |
| 1960 | 2:15:17 | 3:12.4 | 657 s (7.49%) |
| 1970 | 2:09:36.4 | 3:04.3 | 340.6 s (4.2%) |
| 1980 | 2:09:05.6 | 3:03.6 | 30.8 s (0.4%) |
| 1990 | 2:06:50 | 3:00.4 | 135.6 s (1.75%) |
| 2000 | 2:05:42 | 2:58.7 | 68 s (0.89%) |
| 2010 | 2:03:59 | 2:56.3 | 103 s (1.37%) |
| 2020 | 2:01:39 | 2:53.0 | 140 s (1.88%) |
| 2026 (Oct) | 1:59:30 | 2:49.9 | 129 s (1.77%, in under 7 years) |
Three patterns stand out. The 1940s set no new record—the mark stayed at 2:26:14 for the entire decade [1]. Then the 1950s delivered the biggest leap: a 7.49% drop, slicing 657 seconds off the record [1]. Since 1 January 2000 the record has fallen 11 times, by 372 seconds in all [1]. The 2020s, in under seven years, have already cut 129 seconds, nearly as much as the full 2010s managed in ten [1].
The lost decade and the leap: 1940s and 1950s
The 1940s were a standstill for the record: on both January 1, 1940 and January 1, 1950, the world record remained at 2:26:14 [1]. No new official record was set for over 17 years, from March 1935 to June 1952—a gap of 6,295 days [1].
Then came the 1950s. By January 1, 1960, the record had dropped to 2:15:17, a sudden improvement of 657 seconds (7.49%), the steepest in any decade [1]. No other ten-year span in the official record approaches that rate of change.
Small steps and long plateaus: 1970s to 2000s
From our own calculation of 2026-10-30 [1], the men's marathon world record slowed its rate of improvement after the big leap of the 1950s. In the decades after, new records still came, but the changes shrank and the waits stretched out.
Since January 1, 2000, the record has dropped 11 times for a total of 372 seconds [1]. In this stretch, each improvement was incremental—no decade-long leaps, just the sum of small steps. The longest plateau in the data ran from 1935 to 1952: over 17 years without a new mark [1]. The table below shows the decade-by-decade changes based on our site's calculation:
| Period | Record at start | Record at end | Total seconds gained | % faster |
|---|---|---|---|---|
| 1940s | 2:26:14 | 2:26:14 | 0 | 0% |
| 1950s | 2:26:14 | 2:15:17 | 657 | 7.49% |
| 2000s–2026 | 2:05:42 | 1:59:30 | 372 | – |
No source gives the
The 2020s surge: nearly matching the 2010s in under seven years
The current decade stands out. From January 1, 2020 (2:01:39), the record has already dropped by 129 seconds to 1:59:30 as of October 2026, nearly as much as the 140-second drop in the entire 2010s [1]. This is the fastest absolute progress since the 1970s, and the biggest since the 1950s as a share of the decade’s starting mark [1].
The new world record was set by Sabastian Sawe at the London Marathon on April 26, 2026, making him the first man to run a sub-two-hour marathon in race conditions [2]. The record pace is now below 2:50 per kilometer [1].
What these numbers do and do not show
The data here covers only the official men’s world record, decade by decade, using marks recognized by IAAF/World Athletics and ARRS, excluding one disputed result [1]. It does not cover the women’s record (which mixes women-only and mixed races), nor does it explain why each jump happened—factors like shoes, pacing, courses, training, and eligibility rules all changed over time, but the data does not test their impact [1].
No claim is made about whether this trend will continue, only that the 2020s have already moved the record nearly as much as the previous decade, and nothing in the record’s history guarantees a plateau or another surge [1].
An illustration, not a prediction: what 31.83% faster would mean for one runner
Purely as an illustration, not a training target: suppose your marathon best is 3:00:00. If you could improve by the same 31.83% as the world record has over 118 years, your new time would be:
- 3:00:00 × (1 - 0.3183) = 2:02:30 (rounded to the nearest half minute).
This is a drop of almost an hour.
Questions readers ask
Why did the record not improve in the 1940s?
The data only shows the outcome: the men’s marathon world record did not change in the 1940s, with no new official best set for over 17 years [1]. The sources do not say why, and so no cause is claimed here.
Has the women’s marathon record improved the same way?
No; the women’s world record progression mixes women-only and mixed races, and the data here does not cover it [1]. For a closer look at recent pacing and performance trends for both men and women, see the linked studies [4,5].
Will the marathon record keep falling at this pace?
This data does not predict future records; it only tracks what has happened [1]. The 2020s have already matched the 2010s for speed of improvement, but there is no guarantee of further leaps.