Kenya’s marathon magic fades after age 40, study finds

Sabastian Sawe’s recent sub-two-hour marathon run was another reminder that Kenya still rules long-distance running. But a major new global study suggests that this picture is incomplete. Kenya’s grip on the marathon appears strongest just in youth, then fades sharply as runners grow older. The Star spoke to researchers who analysed records of more than one million marathon runners over five years. They found that Kenyans and Ethiopians lead the world only between ages 20 and 39. Then the tables turn. After age 40, marathon runners from the United States, Japan, Germany and Switzerland dominate the road.

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But it's not worth it at this age?

We report on a runner who, at the age of 87, while being the reigning European champion in the 10 km and half-marathon M85, was denied a revision surgery for foot drop after a failed L5/S1 left isthmectomy due to age and poor prognosis. A revision surgery by another surgeon was successful, and at the age of 91, the runner set a European record in the M90 category for both the half-marathon and marathon distances. At 92, he improved the European record in the half-marathon and became the first European in M90 to run under 3 hours. At 94, he set an IAU world record in the 12-hour run in M90. He passed away at the age of 102. The refusal of revision surgery in older age should be critically reconsidered.

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A monodisciplinary approach to study running performance: a bibliometric analysis

Background: The toolkits of bibliometrics analysis enable the mapping and identification of trends within a given research area. This study aims to conduct a bibliometric analysis to identify the evolution of the “running performance” research field, focusing on publication characteristics and trends.  Methods: We conducted a search for original articles, using the “advanced search” feature of Web of Science Core Collection (WoSCC). A predefined search strategy was developed using the PICO strategy. Studies were screened by titles and abstracts. The information was used to map authors, organisations, countries, journals, and authors’ keywords. VOSviewer software (version 1.6.18) was used to construct and visualise bibliometric networks. Results: A total of 324 articles were included, with the publication data ranging from 1983 to 2023, with some variation over time. The United States and Canada presented the strongest influence in this research field, followed by European countries such as England, France, Switzerland, and Spain. The leading journals were the International Journal of Sports Medicine, followed by the Journal of Strength and Conditioning Research, and Medicine and Science in Sports and Exercise.  Temporal trends indicated that the earlier studies primarily focused on physiological tests/variables, while more recent studies have shown a growing interest in biomechanics, pacing, and technology (footwear). Conclusion: North America and European countries present a strong influence in this field of study. Earlier investigations primarily focused on physiological tests/variables, while recent research has focused on diverse topics such as technology (footwear). Researchers interested in this research area should consider adopting a multidisciplinary approach in future studies.

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Tag 1

Am 8. Mai 2026 war der Start der 3. Ostschweizer Marathontage mit der zehnten Austragung des Arbon Marathon bei schönstem Frühlingswetter.

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The Comrades Marathon: A Narrative Review of Physiological Responses and Health Implications in the World's Oldest Ultra-Marathon

Background: The Comrades Marathon is the world’s oldest and largest ultra-marathon, held annually between Durban and Pietermaritzburg, South Africa, since 1921. As a nationally televised event with substantial participation, it provides a unique natural laboratory for studying the physiological demands of prolonged, high-intensity endurance running. This narrative review synthesizes current evidence on physiological responses, performance trends, and health implications associated with participation in the Comrades Marathon. Methods: A systematic search of EBSCO, PubMed, SciELO, and Web of Science identified studies published up to December 2025. Of 116 records retrieved, 42 publications (field studies and case reports) met eligibility criteria and focused specifically on the Comrades Marathon. Results: Women represented 4.2% of finishers, with female participation beginning in 1975. Growth in finishers during the 1970s was driven primarily by men aged 30–59 years. Men were consistently faster than women across all age groups, although the sex performance gap narrowed over time and overall performance improved. Peak performance occurred at ⁓29.9 years in men and ⁓36.0 years in women. Medical encounters occurred at rates up to 20 per 1000 starters. The most affected organ systems were fluid/electrolyte (8.8%; 8.3–9.4), central nervous system (4.0%; 3.7–4.5), and gastrointestinal (2.9%; 2.6–3.2). Dehydration (7.5%; 7.0–8.1) and exercise-associated muscle cramping (3.2%; 2.9–3.6) were the most common diagnoses. Exercise-associated hyponatremia was uncommon (<2%), whereas hypernatremia was substantially more prevalent. Early race editions reported isolated deaths, likely due to ischemic heart disease. Cardiac biomarker elevations and echocardiographic changes observed post-race were transient. The race induced muscle inflammation without major knee MRI abnormalities. In the 1970s, cases of acute kidney injury and renal failure occasionally required dialysis. Faster, well-trained runners showed higher rates of post-race upper respiratory tract infection than slower, less-trained runners. Conclusions: Participation in the Comrades Marathon is associated with well-characterized post-race physiological disturbances. Notably, the event demonstrates an unusually high prevalence of acute kidney injury and hypernatremia compared with other ultra-endurance races, underscoring the substantial renal and fluid–electrolyte stress imposed by prolonged, high-intensity running in challenging environmental conditions. These insights can inform individualized hydration strategies, targeted race preparation, and optimized medical support for ultra-endurance athletes.

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Pacing profiles and slowdown patterns in ultra-triathlon performance

Pacing in long-distance triathlon has been studied primarily for cycling and running in IRONMAN triathlon and daily-format ultra-triathlons, as managing fatigue is critical for success. However, no study has analysed pacing across all three disciplines in an ultra-triathlon such as the second-longest non-stop triathlon format, the Double Deca Iron ultra-triathlon covering 76 km swimming, 3600 km cycling, and 844 km running. This study examined pacing during a Double Deca Iron ultra-triathlon by analysing split and lap times for all official male and female finishers. We assessed pacing patterns, the influence of pacing variability on performance, and whether faster performance was associated with more frequent moderate slowdowns or with fewer but more pronounced slowdowns. Official race data from the 2023 Swissultra Double Deca Iron ultra-triathlon held in Buchs, Switzerland were analysed for 9 men and 4 women. Swimming splits were recorded manually, and both cycling and running splits were recorded via RFID timing. Variables included mean speed, checkpoint speed variability (ACCS), proportions of slow-down checkpoints (25–50%, 50–75%, > 75% slower than mean speed), and magnitude of slowdown. Athletes showed negative pacing in swimming (decreasing time) but an even or slightly positive pacing in both cycling and running. Running variability did not correlate with running speed. In swimming, faster athletes tended to show fewer relative slowdowns. In cycling, faster cyclists had fewer moderate but more pronounced slowdowns, while in running, faster runners showed more ≥ 75% slowdowns. In summary, higher performers maintained a relatively steady and fast baseline pace interspersed with occasional substantial slowdowns, rather than moving continuously at a slower and more variable pace. Because the timing data do not directly identify intentional rest, these slowdown patterns should not be interpreted as confirmed rest breaks.

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The New York City Marathon: A systematic review of performance, participation, pacing, and health-related outcomes

The ‘New York City Marathon’ is one of the world’s largest and most influential mass‑participation marathons. Although numerous studies have examined performance trends, participation patterns, pacing behavior, environmental influences, and physiological aspects of runners in this event, no review has synthesized the evidence specific to this race. This study aimed to systematically summarize the scientific literature on the ‘New York City Marathon’. A systematic search of Scopus, PubMed, Web of Science, Embase, and Cochrane was conducted using terms related to the ‘New York City Marathon’ to identify studies published up to February 2026. Eligible studies included runners of all ages, sexes, and performance levels, with no restrictions on publication date, topic, or study design. Extracted data included: (1) authors; (2) publication year; (3) study design; (4) sample characteristics; (5) variables assessed; and (6) main findings. Results were synthesized narratively by domain. Seventy‑six publications met the inclusion criteria. Participation increased markedly over time, driven primarily by growth among women and age‑group runners. While elite and competitive age‑group performances improved in recent decades, mean finish times across the entire field increased by ~40 min since the 1970s, reflecting the democratization of marathon running. Ethiopian runners were the youngest and fastest. Peak performance occurred at 29.7 years in women and 34.8 years in men (1‑year age intervals), and in the 30–34 and 35–39 age groups, respectively (5‑year intervals). Approximately 10 % of runners experienced major injuries during training or the race that prevented starting or finishing. Higher training volumes increased injury risk, with foot, knee, and hip injuries most common, whereas adequate preparation reduced risk. Environmental conditions—particularly temperature—had a stronger influence on race times than course metrics. Performance declined with increasing temperature, especially among slower runners and among men aged 30–64 and women aged 40–64. Runners generally adopted a positive pacing strategy with a final spurt in the last segment (40–42.2 km). The fastest split occurred between 5–10 km and the slowest between 35–40 km, coinciding with the undulating terrain entering Central Park. Older athletes paced more evenly than younger athletes. Men showed a larger decrease in running speed from the fastest to the slowest splits than women (21.1 % vs. 16.7 %). Slower runners exhibited greater early‑race deceleration but larger late‑race speed increases, whereas faster runners maintained the most even pacing. Participation in the ‘New York City Marathon’ has grown substantially, driven by increased involvement of women and age‑group runners. Although elite performance has improved, overall mean finish times have slowed due to broader participation. Ethiopian runners were the youngest and fastest, with peak performance occurring in the early to mid‑30s. Injury prevalence was considerable, particularly with higher training volumes, though adequate preparation mitigated risk. Higher temperatures slowed performance, especially among slower runners. Pacing was predominantly positive, with older athletes pacing more evenly and faster runners showing the smallest performance decline. Future research should explore cardiovascular monitoring technologies—including real‑time ECG streaming during the race—and assess the impact of innovations such as carbon‑plated “supershoes” on performance and pacing.

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2025 World Megamarathon Ranking 300+

Vor kurzem wurde die Rangliste der Menschen die weltweit mehr als 300 Marathons gelaufen sind.

Die Liste umfasst 1341 Menschen.

In Führung ist der Deutsche Christian Hottas (Jg1956) mit 3386 Marathons. Der beste Schweizer ist Christian Marti (Jg 1952) auf Rang 272 mit 620 Marathons, der zweitbeste Schweizer ist Beat Knechtle (Jg 1964) auf Rang 401 mit 534 Marathons.

2025 World Megamarathon Ranking 300+

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