What does a 76-year-old marathon world-record holder look like?
VO2max 47.9 (best known for a woman >75), HRmax 180 vs 155 predicted, marathon at 88% of VO2max, ordinary economy; ~90% easy running. n = 1: possible, not typical.
Van Hooren et al. tested a 76-year-old American runner (1.54 m, 45.1 kg) six days after she set the 75-79 marathon world record (3:33:27, London 2024). She started running at 35 and holds the age-group world records from 1,500 m to the marathon.
On a treadmill her VO2max was 47.9 mL/kg/min (2.16 L/min), the highest the authors know for a woman over 75 and still in the 90th percentile for women aged 20-29 by ACSM and FRIEND tables; her HRmax was 180 beats/min, far above the Tanaka prediction of 155.
Lactate threshold and lactate turnpoint fell at 83% and 92% of VO2max (11.1 and 12.5 km/h) and marathon pace (11.9 km/h) at 88% of VO2max and 94% of HRmax, values similar to younger world-class runners. Her oxygen cost of running (about 215 mL/kg/km at 12 km/h) was that of younger recreational runners and worse than a 71-year-old male marathon record holder (179).
In the year before the record she ran about 70 km a week in six sessions, rising to 110 km in the last 3-4 months, with three interval sessions a week but about 90% of time in the moderate domain by heart rate. She reported one running injury in 36 years (a metatarsal fracture five months after testing).
Our reading: a description of what is possible in one woman; the authors themselves say training and genetics "cannot be discerned", and the intensity distribution covers only 6 weeks.
Protocol
Design: single case report, one test day, six days after the London Marathon 2024 world record; ethics approval Maastricht University (FHML-REC2022100); written consent including publication of identifiable data.
Who: woman, 76 years, Asian ethnicity, American; 1.54 m, 45.1 kg, BMI 19.0, body fat 13.7% (4-site skinfolds), fat-free mass 38.9 kg; started running at 35, before that only Korean dance class; focus 5 km to marathon; six gold medals at the 2024 World Masters Championships (800 m to half marathon).
Training (from her GPS watch): ~70 km/week in six sessions over the year before the record, rising to 110 km in the last 3-4 months; longest run ~38 km (3.5 h); 4-5 runs over 30 km at 11.0-11.4 km/h; easy runs at 10.4-11.0 km/h; three interval sessions a week, usually not to maximal effort; ~20 g of carbohydrate on long runs. The abstract gives 115 and 84 km/week averages for the 6 weeks before the marathon and before the World Championships.
Step test: treadmill at 0% incline in the shoes she raced in, 17.9 °C; 5-min warm-up, 3-min stages from 9 km/h rising 0.5 km/h until RPE above 18, an extra stage at marathon record speed (11.9 km/h); breath-by-breath gas exchange (Jaeger Vyntus CPX); ear-lobe lactate after each stage; chest-strap heart rate.
Thresholds and economy: lactate threshold by log-log method; lactate turnpoint as the first sustained rise of more than 1.5 mmol/L; oxygen and energy cost from the last minute of steady-state stages with RER below 1.00.
VO2max test: 10 min after the step test, ramp from 10 km/h rising 1 km/h per minute to exhaustion; VO2max = highest 30-s moving average; no verification bout.
Other measures: gastrocnemius medialis and soleus architecture by ultrasound, squat and countermovement jumps, spatiotemporal running data (in the Supplemental Material).
Comparators: published values only — two male masters world-record holders (a 75-year-old middle-distance and a 71-year-old marathon runner, different protocols), ACSM and FRIEND percentiles, untrained age-matched women, young elite runners.
Funding: no grant is listed; the authors declare no conflicts of interest. The runner is thanked by name in the Acknowledgements.
Key Results
| Measure | Her value | Comparison given by the authors |
|---|---|---|
| VO2max | 47.9 mL/kg/min (2.16 L/min) | untrained women 70-79 ~17.5-27.4; 90th percentile of women 20-29; 3.2 times the functional-independence requirement |
| VO2max per fat-free mass | 55.5 mL/kg/min | age-matched untrained 34.7; women 20-29 55.9 |
| HRmax | 180 beats/min | Tanaka prediction 155; untrained age-matched women 135; male record holders 164 and 160 |
| Maximal oxygen pulse | 12.0 mL/beat | women 70-85: 9.8; male record holders 21.1 and 18.9 |
| Lactate threshold | 83% of VO2max at 11.1 km/h, 162 beats/min | young world-class athletes "almost identical" |
| Lactate turnpoint | 92% of VO2max at 12.5 km/h, 174 beats/min | same |
| Marathon record pace (11.9 km/h) | 88% of VO2max, 94% of HRmax (169 beats/min) | 71-year-old male record holder 88.5% |
| Oxygen cost at 12 / 13 km/h | 215 / 206 mL/kg/km (abstract: 210 at marathon speed) | elite runners below 190; 71-year-old male marathon record holder 179 / 178 |
| Energy cost at 12 / 13 km/h | 1.07 / 1.08 kcal/kg/km | 75-year-old male middle-distance holder 1.11 / 1.09 |
| Velocity at VO2max; maximal speed | 13.9 km/h; 15.1 km/h | a 1.2 km/h gap, "higher than" young well-trained distance runners (0.5) |
| Peak lactate; maximal RER | 9.14 mmol/L; 1.08 | — |
| Squat jump; countermovement jump | 18.7 cm; 17.9 cm | — |
| Medial gastrocnemius fascicle / leg length; pennation | 0.18; 19° | similar to non-elite male masters runners of 60 |
| Step frequency | above 190 steps/min at all speeds | — |
| Intensity distribution (6 weeks, by HR) | ~90% moderate, 9% heavy, 1% severe | "largely similar to younger world-class athletes" |
| Event | All-time best (age) | 75-79 world record |
|---|---|---|
| 1,500 m | 06:14 (75) | 06:14 |
| 5,000 m | 18:48 (45) | 22:41 |
| 10 km road | 37:48 (49) | 46:53 |
| Half marathon | 1:26:24 (44) | 1:40:42 |
| Marathon | 3:12:01 (54) | 3:33:27 (set within a week of testing) |
What carried the performance (the authors' reading): a very high VO2max for her age and a young-elite fractional utilisation, not economy. Her economy was "relatively modest", similar to young recreational runners.
Volume against intensity: under 1% of time above the heavy-severe boundary by heart rate (under 10% by speed) in the analysed 6 weeks, yet three interval sessions a week.
Consistency: one running-related injury in 36 years, which happened about five months after testing.
Mechanisms
Measured: HRmax 25 beats/min above the Tanaka prediction and an oxygen pulse below the two male record holders; the authors read this as a high cardiac output reached through heart rate more than stroke volume.
Measured: VO2max per fat-free mass (55.5) equals that of women aged 20-29 and is 2.0 times an age-matched reference, against 1.6 times per body mass; the authors read the high VO2max as "primarily" central (cardiac). Inference: VO2max per fat-free mass does not isolate peripheral from central factors, so this split is interpretive.
Authors' interpretation: her modest economy may come from lower weekly distance than the male marathon record holder (80 vs 135-140 km/week), short legs and a high step frequency (above 190/min), muscle architecture like non-elite runners, and ageing of tendon stiffness and the cost of breathing. None was tested against economy in her.
Authors' interpretation: with ~90% moderate-domain training and under 1% above the heavy-severe boundary, VO2max "could be maintained as age progresses via relatively high running volumes, without a particularly strong emphasis on high-intensity exercise", if the 6 weeks are representative. Inference: she did three interval sessions a week; a heart-rate zone split under-counts short hard efforts, so "little intensity" is not what the training log describes.
Inference: she set her first world records only in the 70-74 class, after 35 years of running; the authors find it plausible that long training "played a major role", but survival, selection and genetics are not separable from training in one person.
Practical Application
What does a 76-year-old marathon world-record holder look like? VO2max 47.9 (best known for a woman >75), HRmax 180 vs 155 predicted, marathon at 88% of VO2max, ordinary economy; ~90% easy running. n = 1: possible, not typical.
Do not set an older runner's zones from an age formula (the base's practice, supported here): her HRmax was 180 against a Tanaka prediction of 155; a Tanaka-based scale would have placed her lactate-threshold heart rate (162) above her predicted "maximum" and labelled easy running as hard (inference). Take anchors from a field effort (SYNTH-38; REF-1082).
Easy-dominant volume is compatible with world-class masters running (one case): ~90% of time in the moderate domain and three interval sessions a week sat behind these records. It matches the base's general rule that the easy share follows the hours (SYNTH-26); it does not show that less intensity is better for older runners.
Staying uninjured is part of the result (the base's reading): one running injury in 36 years. The base's evidence that weeks lost to injury and illness predict failure is in elite track athletes (REF-1001, B); for an older athlete the same logic argues for protecting continuity over chasing peak weeks (inference).
Starting late is not a bar (one case): she began running at 35. What she shows is possible after a late start, not what a late starter should expect.
Limitations
One woman, one test day; nothing is compared with a control tested the same way, and the male comparators used other protocols (the authors flag threshold methods in particular).
Tested six days after a world-record marathon; the authors argue the effect was small (a predicted marathon of 3:30:16, ~1.5% faster than the record), but economy in particular may have been affected.
No VO2max verification bout; the ramp started 10 min after a long step test.
Training characteristics come from her GPS watch; the intensity distribution covers 6 weeks before two competitions and is in the Supplemental Material, which this entry did not read. Heart-rate zones under-count short intervals.
Internal inconsistency on weekly distance: the abstract gives 115 km/week for the 6 weeks before the marathon, while the Results say training rose "to 110 km" and the Discussion "a maximum of 110 km·wk−1"; her usual volume is "∼70 km·wk−1" in the Results but "80 km·wk−1" in the Discussion. The Results also print "V̇o2max was 13.9 km·h−1" where the velocity at VO2max is meant.
Body composition by skinfolds (Jackson-Pollock), a crude estimate in a 45-kg older woman.
The authors state that training adaptations and genetics "cannot be discerned"; the subject self-selected as a record holder, so survivorship is built in.
Funding: none stated; no conflicts declared.
How this entry was checked and changed
Why this level
single case study (the rubric's row for n = 1), read from the full text (journals.physiology.org, open access, final version); the Supplemental Material (training intensity distribution and yearly volume) was not read. No comparator except published values from other people and protocols
Full text (checked 2026-10-22)
A 76-yr-old American world-class long-distance athlete of Asian ethnicity, 1.54 m and 45.1 kg; "She started running at the age of 35 yr" (full text).
"All experiments were performed on a single day, six days following her world-record marathon performance at London Marathon 2024" (full text).
V̇o2max corresponded to 47.9 mL·kg−1·min−1 (2.16 L·min−1); HRmax was 180 beats·min−1; maximal RER was 1.08; peak BLa 9.14 mmol·L−1; maximum speed 15.1 km·h−1 (full text).
HRmax "considerably higher than predicted for her age using the Tanaka equation (15) (155 beats·min−1)"; maximum oxygen pulse 12.0 mL·beat−1; females aged 70–85 (9.8 mL·beat−1) (full text).
Fractional utilization at LT and LTP was 83% (11.1 km·h−1; 162 beats·min−1) and 92% (12.5 km·h−1; 174 beats·min−1); marathon speed (11.9 km·h−1) corresponded to 88% of V̇o2max and 94% of the HRmax (169 beats·min−1) (full text).
Table 2: OC at 12 km·h−1 215, 221, 179; OC at 13 km·h−1 206, 213, 178; V̇o2max relative to FFM 55.5, 55.2, 53.9 (full text).
RE worse than elite runners (∼215 mL·kg−1·km−1 vs. <190 mL·kg−1·km−1), "similar to values found in younger recreational runners" (full text).
Average weekly training distance ∼70 km·wk−1 in six sessions per week, with a gradual increase to 110 km in the 3–4 mo before the marathon; longest session ∼38 km (3.5 h) (full text).
"∼90% of her training performed in the moderate intensity domain"; above the heavy-severe boundary "<1% for HR and <10% for speed"; three interval sessions per week (full text).
"only one running-related injury in her 36-yr running career (metatarsal fracture due to a step on a rock; at an age of 76 yr in September 2024 ∼5 mo after the reported experiments)" (full text).
"factors relate to training adaptations and genetics cannot be discerned in explaining the runner's exceptional performances" (full text).