Six-year follow-up of a world record-breaking master marathon runner
Date
2024-11-01
Journal Title
Journal ISSN
Volume Title
Publisher
Journal of Applied Physiology
Abstract
Endurance performance declines with advancing age. Of the three main physiological factors that determine endurance running performance [maximal oxygen consumption (V̇o2max), lactate threshold, and running economy (RE)], V̇o2max appears to be most affected by age. Although endurance performance declines with age, recently, endurance performance has rapidly improved in master athletes as the number of master athletes competing in endurance events has increased. Master athletes represent an intriguing model to study healthy aging. In this case study, we reassessed the physiological profile of a 76-yr-old distance runner who broke the marathon world record for men over 70 yr of age in 2018. This runner was tested a few months before breaking the world record and retested in 2024. Between 2018 and 2024, his marathon running velocity decreased significantly. Therefore, the purpose of this case study was to determine the physiological changes that explain his performance decline. RE remained similar to 2018, and while there was not a clear breakpoint in blood lactate, he still likely runs marathons at a high percentage (∼90%) of his V̇o2max. However, V̇o2max declined by 15.1%. HRmax declined by 3.2% and maximal O2 pulse declined by 12.4%, suggesting that maximal stroke volume and/or arteriovenous O2 difference decreased. Altogether, although this marathoner continues to compete at an elite level, his performance has declined since his record-breaking marathon due to a reduction in V̇o2max. This is likely caused by reductions in maximal stroke volume and/or arteriovenous O2 difference. We speculate that these changes reflect primarily age-related processes.
NEW & NOTEWORTHY We performed 6-yr follow-up testing on a world record-breaking master marathon runner. We determined that his performance declined since his record-breaking marathon in 2018 primarily due to a reduction in V̇o2max. His max heart rate (HR) changed minimally, but his peak O2 pulse decreased, suggesting that his maximal stroke volume and/or arteriovenous O2 difference decreased. These changes likely reflect primarily age-related effects in the absence of an overt pathological disease process.
Description
This article was originally published in Journal of Applied Physiology. The version of record is available at: https://doi.org/10.1152/japplphysiol.00474.2024.
Copyright © 2024 the American Physiological Society.
This article will be embargoed until 11/01/2025.
Keywords
aging, case study, master athlete, oxygen consumption, running
Citation
Romberger, Nathan T., Joseph M. Stock, Ronald K. McMillan, Matthew L. Overstreet, Romuald Lepers, Michael J. Joyner, and William B. Farquhar. “Six-Year Follow-up of a World Record-Breaking Master Marathon Runner.” Journal of Applied Physiology 137, no. 5 (November 1, 2024): 1354–58. https://doi.org/10.1152/japplphysiol.00474.2024.