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

详细信息    查看全文

• 作者：Katherine M. Shea ; MD^a ; ^{anderson.kate@gmail.com" class="auth_mail" title="E-mail the corresponding author} ; Eric R. Ladd ; MD^a ; Grant S. Lipman ; MD^b ; Patrick Bagley ; BA^c ; Elizabeth A. Pirrotta ; MS^b ; Hurnan Vongsachang ; BA^b ; N. Ewen Wang ; MD^b ; Paul S. Auerbach ; MD^b
• 关键词：6-minute walk test ; exercise test ; altitude sickness ; mountaineering ; hypoxia
• 刊名：Wilderness & Environmental Medicine
• 出版年：2016
• 出版时间：March 2016
• 年：2016
• 卷：27
• 期：1
• 页码：19-24
• 全文大小：112 K

文摘

To test whether the 6-minute walk test (6MWT), including postexercise vital sign measurements and distance walked, predicts summit success on Denali, AK.

Methods

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.

Results

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.

Conclusions

This study did not show a correlation between postexercise oxygen saturation or 6MWTD and summit success on Denali.