Consistency Is Key When Setting a New World Record for Running 10 Marathons in 10 Days

Background: We describe the requirements and physiological changes when running 10 consecutive marathons in 10 days at the same consistent pace by a female ultra-endurance athlete. Methods: Sharon Gayter (SG) 54 yrs, 162.5 cm, 49.3 kg maximal oxygen uptake (VO<sub>2</sub> max) 53 mL/kg&l...

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Autores principales:	Nicolas Berger, Daniel Cooley, Michael Graham, Claire Harrison, Georgia Campbell, Russ Best
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	ultra-endurance Marathon pacing energy expenditure world record running Medicine R
Acceso en línea:	https://doaj.org/article/91ab5da854cc42729052a988bb832c01
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spelling	oai:doaj.org-article:91ab5da854cc42729052a988bb832c012021-11-25T17:50:48ZConsistency Is Key When Setting a New World Record for Running 10 Marathons in 10 Days10.3390/ijerph1822120661660-46011661-7827https://doaj.org/article/91ab5da854cc42729052a988bb832c012021-11-01T00:00:00Zhttps://www.mdpi.com/1660-4601/18/22/12066https://doaj.org/toc/1661-7827https://doaj.org/toc/1660-4601Background: We describe the requirements and physiological changes when running 10 consecutive marathons in 10 days at the same consistent pace by a female ultra-endurance athlete. Methods: Sharon Gayter (SG) 54 yrs, 162.5 cm, 49.3 kg maximal oxygen uptake (VO<sub>2</sub> max) 53 mL/kg<sup>−1</sup>/min<sup>−1</sup>. SG completed 42.195 km on a treadmill every day for 10 days. We measured heart rate (HR), Rating of Perceived Exertion (RPE), oxygen uptake (VO<sub>2</sub>), weight, body composition, blood parameters, nutrition, and hydration. Results: SG broke the previous record by ~2.5 h, with a cumulative completion time of 43 h 51 min 39 s. Over the 10 days, weight decreased from 51 kg to 48.4 kg, bodyfat mass from 9.1 kg to 7.2 kg (17.9% to 14.8%), and muscle mass from 23.2 kg to 22.8 kg. For all marathons combined, exercise intensity was ~60% VO<sub>2</sub> max; VO<sub>2</sub> 1.6 ± 0.1 L.min<sup>−1</sup>/32.3 ± 1.1 mL.kg<sup>−1</sup>.min<sup>−1</sup>, RER 0.8 ± 0, HR 143 ± 4 b.min<sup>−1</sup>. Energy expenditure (EE) was 2030 ± 82 kcal/marathon, total EE for 10 days (including BMR) was 33,056 kcal, daily energy intake (EI) 2036 ± 418 kcal (20,356 kcal total), resulting an energy deficit (ED) of 12,700 kcal. Discussion: Performance and pacing were highly consistent across all 10 marathons without any substantial physiological decrements. Although overall EI did not match EE, leading to a significant ED, resulting in a 2.6 kg weight loss and decreases in bodyfat and skeletal muscle mass, this did not affect performance.Nicolas BergerDaniel CooleyMichael GrahamClaire HarrisonGeorgia CampbellRuss BestMDPI AGarticleultra-enduranceMarathonpacingenergy expenditureworld recordrunningMedicineRENInternational Journal of Environmental Research and Public Health, Vol 18, Iss 12066, p 12066 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	ultra-endurance Marathon pacing energy expenditure world record running Medicine R
spellingShingle	ultra-endurance Marathon pacing energy expenditure world record running Medicine R Nicolas Berger Daniel Cooley Michael Graham Claire Harrison Georgia Campbell Russ Best Consistency Is Key When Setting a New World Record for Running 10 Marathons in 10 Days
description	Background: We describe the requirements and physiological changes when running 10 consecutive marathons in 10 days at the same consistent pace by a female ultra-endurance athlete. Methods: Sharon Gayter (SG) 54 yrs, 162.5 cm, 49.3 kg maximal oxygen uptake (VO<sub>2</sub> max) 53 mL/kg<sup>−1</sup>/min<sup>−1</sup>. SG completed 42.195 km on a treadmill every day for 10 days. We measured heart rate (HR), Rating of Perceived Exertion (RPE), oxygen uptake (VO<sub>2</sub>), weight, body composition, blood parameters, nutrition, and hydration. Results: SG broke the previous record by ~2.5 h, with a cumulative completion time of 43 h 51 min 39 s. Over the 10 days, weight decreased from 51 kg to 48.4 kg, bodyfat mass from 9.1 kg to 7.2 kg (17.9% to 14.8%), and muscle mass from 23.2 kg to 22.8 kg. For all marathons combined, exercise intensity was ~60% VO<sub>2</sub> max; VO<sub>2</sub> 1.6 ± 0.1 L.min<sup>−1</sup>/32.3 ± 1.1 mL.kg<sup>−1</sup>.min<sup>−1</sup>, RER 0.8 ± 0, HR 143 ± 4 b.min<sup>−1</sup>. Energy expenditure (EE) was 2030 ± 82 kcal/marathon, total EE for 10 days (including BMR) was 33,056 kcal, daily energy intake (EI) 2036 ± 418 kcal (20,356 kcal total), resulting an energy deficit (ED) of 12,700 kcal. Discussion: Performance and pacing were highly consistent across all 10 marathons without any substantial physiological decrements. Although overall EI did not match EE, leading to a significant ED, resulting in a 2.6 kg weight loss and decreases in bodyfat and skeletal muscle mass, this did not affect performance.
format	article
author	Nicolas Berger Daniel Cooley Michael Graham Claire Harrison Georgia Campbell Russ Best
author_facet	Nicolas Berger Daniel Cooley Michael Graham Claire Harrison Georgia Campbell Russ Best
author_sort	Nicolas Berger
title	Consistency Is Key When Setting a New World Record for Running 10 Marathons in 10 Days
title_short	Consistency Is Key When Setting a New World Record for Running 10 Marathons in 10 Days
title_full	Consistency Is Key When Setting a New World Record for Running 10 Marathons in 10 Days
title_fullStr	Consistency Is Key When Setting a New World Record for Running 10 Marathons in 10 Days
title_full_unstemmed	Consistency Is Key When Setting a New World Record for Running 10 Marathons in 10 Days
title_sort	consistency is key when setting a new world record for running 10 marathons in 10 days
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/91ab5da854cc42729052a988bb832c01
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Consistency Is Key When Setting a New World Record for Running 10 Marathons in 10 Days

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