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The 6-Minute Walk Test as a Predictor of Summit Success on Denali.

https://arctichealth.org/en/permalink/ahliterature279175
Source
Wilderness Environ Med. 2016 Mar;27(1):19-24
Publication Type
Article
Date
Mar-2016
Author
Katherine M Shea
Eric R Ladd
Grant S Lipman
Patrick Bagley
Elizabeth A Pirrotta
Hurnan Vongsachang
N Ewen Wang
Paul S Auerbach
Source
Wilderness Environ Med. 2016 Mar;27(1):19-24
Date
Mar-2016
Language
English
Publication Type
Article
Keywords
Adolescent
Adult
Aged
Alaska
Female
Humans
Male
Middle Aged
Mountaineering - statistics & numerical data
Prospective Studies
Walk Test - methods
Young Adult
Abstract
To test whether the 6-minute walk test (6MWT), including postexercise vital sign measurements and distance walked, predicts summit success on Denali, AK.
This was a prospective observational study of healthy volunteers between the ages of 18 and 65 years who had been at 4267 m for less than 24 hours on Denali. Physiologic measurements were made after the 6MWT. Subjects then attempted to summit at their own pace and, at the time of descent, completed a Lake Louise Acute Mountain Sickness Questionnaire and reported maximum elevation reached.
One hundred twenty-one participants enrolled in the study. Data were collected on 111 subjects (92% response rate), of whom 60% summited. On univariate analysis, there was no association between any postexercise vital sign and summit success. Specifically, there was no significant difference in the mean postexercise peripheral oxygen saturation (Spo2) between summiters (75%) and nonsummiters (74%; 95% CI, -3 to 1; P = .37). The distance a subject walked in 6 minutes (6MWTD) was longer in summiters (617 m) compared with nonsummiters (560 m; 95% CI, 7.6 to 106; P = .02). However, this significance was not maintained on a multivariate analysis performed to control for age, sex, and guide status (P = .08), leading to the conclusion that 6MWTD was not a robust predictor of summit success.
This study did not show a correlation between postexercise oxygen saturation or 6MWTD and summit success on Denali.
PubMed ID
26712335 View in PubMed
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