Purpose: To present the acclimatization strategy employed by an elite athlete prior to 2 successful ascents to Mount Everest (including a “fastest known time”) in 1 wk. Methods: Training volume, training content, and altitude exposure were recorded daily. Vertical velocity was recorded by GPS (global positioning system) heart-rate monitor. Results: The subject first used a live high–train low and high preacclimatization method in normobaric hypoxia (NH). Daily, he combined sleeping in a hypoxic tent (total hours: ∼260) and exercising “as usual” in normoxia but also in NH (altitude >6000 m: 30 h), including at high intensity. The hypoxic sessions were performed at the second threshold on treadmill in NH at 6000 m, and the pulse saturation increased from 70% to 85% over 1 mo. Then, the subject was progressively exposed to hypobaric hypoxia, first in the Alps and then in the Himalayas. On day 18, he reached for the second time an altitude >8000 m with the fastest vertical velocity (350 m/h) ever measured between 6300 and 8400 m. Afterward, he climbed twice in a week to the summit of Mount Everest (8848 m, including a “fastest known time” of 26.5 h from Rongbuk Monastery, 5100 m). Conclusion: Overall, this acclimatization was successful and in line with the most recent recommendations: first, using live high–train low and high, and second, using hypobaric hypoxia at increasing altitudes for a better translation of the NH benefits to hypobaric hypoxia. This case study reports the preparation for the most outstanding performance ever acheived at an extreme altitude.
Millet is with the Inst of Sport Sciences (ISSUL), University of Lausanne, Lausanne, Switzerland. Jornet is with Salomon S.A.S., Annecy, France.
Richalet JP, Larmignat P, Poitrine E, Letournel M, Canoui-Poitrine F. Physiological risk factors for severe high-altitude illness: a prospective cohort study. Am J Respir Crit Care Med. 2012;185(2):192–198. PubMed ID: 22071330 doi:10.1164/rccm.201108-1396OC
LuksAM. Clinician’s corner: what do we know about safe ascent rates at high altitude?High Alt Med Biol. 2012;13(3):147–152. PubMed ID: 22994513 doi:10.1089/ham.2012.105510.1089/ham.2012.105522994513)| false
Faiss R, von Orelli C, Deriaz O, Millet GP. Responses to exercise in normobaric hypoxia: comparison of elite and recreational ski mountaineers. Int J Sports Physiol Perform. 2014;9(6):978–984. PubMed ID: 24664934 doi:10.1123/ijspp.2013-0524
FaissR, von OrelliC, DeriazO, MilletGP. Responses to exercise in normobaric hypoxia: comparison of elite and recreational ski mountaineers. . 2014;9(6):978–984. PubMed ID: 24664934 doi:10.1123/ijspp.2013-052410.1123/ijspp.2013-052424664934)| false
Millet GP, Faiss R, Pialoux V. Evidence for differences between hypobaric and normobaric hypoxia is conclusive. Exerc Sport Sci Rev. 2013;41(2):133. PubMed ID: 23524575 doi:10.1097/JES.0b013e318271a5e1
MilletGP, FaissR, PialouxV. Evidence for differences between hypobaric and normobaric hypoxia is conclusive. . 2013;41(2):133. PubMed ID: 23524575 doi:10.1097/JES.0b013e318271a5e110.1097/JES.0b013e318271a5e123524575)| false
Zoll J, Ponsot E, Dufour S, et al. Exercise training in normobaric hypoxia in endurance runners. III. Muscular adjustments of selected gene transcripts. J Appl Physiol. 2006;100(4):1258–1266. PubMed ID: 16540710 doi:10.1152/japplphysiol.00359.2005
ZollJ, PonsotE, DufourS, et al. Exercise training in normobaric hypoxia in endurance runners. III. Muscular adjustments of selected gene transcripts. . 2006;100(4):1258–1266. PubMed ID: 16540710 doi:10.1152/japplphysiol.00359.20051654071010.1152/japplphysiol.00359.2005)| false
SolliGS, TonnessenE, SandbakkO. The training characteristics of the world’s most successful female cross-country skier. . 2017;8:1069. PubMed ID: 29326603 doi:10.3389/fphys.2017.0106910.3389/fphys.2017.0106929326603)| false
RichaletJP, BittelJ, HerryJP, et al. Use of a hypobaric chamber for pre-acclimatization before climbing Mount Everest. . 1992;13(suppl 1):S216–S220. doi:10.1055/s-2007-102464410.1055/s-2007-10246441483780)| false