نتایج جستجو برای: mountain climbers
تعداد نتایج: 26908 فیلتر نتایج به سال:
OBJECTIVE To examine patterns of mortality among climbers on Mount Everest over an 86 year period. DESIGN Descriptive study. SETTING Climbing expeditions to Mount Everest, 1921-2006. PARTICIPANTS 14,138 mountaineers; 8030 climbers and 6108 sherpas. MAIN OUTCOME MEASURE Circumstances of deaths. RESULTS The mortality rate among mountaineers above base camp was 1.3%. Deaths could be clas...
BACKGROUND The level of environmental hypobaric hypoxia that affects climbers at the summit of Mount Everest (8848 m [29,029 ft]) is close to the limit of tolerance by humans. We performed direct field measurements of arterial blood gases in climbers breathing ambient air on Mount Everest. METHODS We obtained samples of arterial blood from 10 climbers during their ascent to and descent from t...
The aim of this study was to test a hypothesis that a longer duration of isometric contraction is related to an increased oxygenation status of the muscle. A group of trained rock climbers and untrained subjects performed 15 kp sustained isometric contraction until fatigue set in. The oxygenation status was assessed using near infrared spectroscopy (ISS, USA). The results support the hypothesis...
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