Skip Navigation LinksHome > October 2008 - Volume 40 - Issue 10 > Mt. Whitney: Determinants of Summit Success and Acute Mounta...
Medicine & Science in Sports & Exercise:
doi: 10.1249/MSS.0b013e31817e91b8
APPLIED SCIENCES: Physical Fitness and Performance

Mt. Whitney: Determinants of Summit Success and Acute Mountain Sickness

WAGNER, DALE R.1; D'ZATKO, KIM2; TATSUGAWA, KEVIN3; MURRAY, KEN4; PARKER, DARYL5; STREEPER, TIM5; WILLARD, KEVIN5

Collapse Box

Abstract

Purpose: The aim of this study was to determine the prevalence of summit success and acute mountain sickness (AMS) on Mt. Whitney (4419 m) and to identify variables that contribute to both.

Methods: Hikers (N = 886) attempting the summit were interviewed at the trailhead upon their descent. Questionnaires included demographic and descriptive data, acclimatization and altitude history, and information specific to the ascent. The Lake Louise Self-Assessment Score was used to make a determination about the occurrence of AMS. Logistic regression techniques were used to calculate odds ratios (OR) for AMS and summit success.

Results: Forty-three percent of the sample met the criteria for AMS, and 81% reached the summit. The odds of experiencing AMS were reduced with increases in age (adjusted 10-yr OR = 0.78; P < 0.001), number of hours spent above 3000 m in the 2 wk preceding the ascent (adjusted 24-h OR = 0.71; P < 0.001), and for females (OR = 0.68; P = 0.02). Climbers who had a history of AMS (OR = 1.41; P = 0.02) and those taking analgesics (OR = 2.39; P < 0.001) were more likely to experience AMS. As climber age increased, the odds of reaching the summit decreased (adjusted 10-yr OR = 0.75; P < 0.001). However, increases in the number of hours per week spent training (adjusted 5-h OR = 1.24; P = 0.05), rate of ascent (adjusted 50 m·h−1 OR = 1.13; P = 0.04), and previous high-altitude record (adjusted 500 m OR = 1.26; P < 0.001) were all associated with increased odds for summit success.

Conclusions: A high percentage of trekkers reached the summit despite having symptoms of AMS.

©2008The American College of Sports Medicine

Login

Article Tools

Share

Search for Similar Articles
You may search for similar articles that contain these same keywords or you may modify the keyword list to augment your search.

Connect With Us