Selenium (Se) levels in blood (whole blood, erythrocytes and serum) and blood glutathione peroxidase (GSH-Px) activity were investigated in people living at high altitude in Bolivia (4,000 m above sea level). These parameters were compared to those of people living at low altitude (300 m above sea level). The Se levels in whole blood of the high-altitude subjects did not differ significantly fr...

BACKGROUND A paucity of knowledge currently exists surrounding the effects of altitude on femur fracture outcomes. The purpose of this study was to determine if altitude plays a significant role in determining the outcome of femoral shaft fractures in the elderly. The authors hypothesized that the additional cardiopulmonary stress of altitude would promote poorer outcomes of those individuals t...

Introduction: Moderate altitude training has become popular to improve competition performance in swimming both at altitude and sea level. The aim of the present study was to examine the influence of moderate altitude training on lactate curve during three weeks and after the exposure to altitude training at 1860 m and to examine the effects of altitude training on selected blood parameters bef...

Acute altitude illnesses are potentially serious conditions that can affect otherwise fit individuals who ascend too rapidly to altitude. They include high altitude headache, acute mountain sickness, high altitude cerebral oedema, and high altitude pulmonary oedema. The number of people travelling to altitude for work (soldiers, miners, construction workers, and astronomers) or for recreation (...

Using spaceborne lidar observations and reanalyzes (2008–2014), we relate the vertical wind speed at 500 hPa (ω500), indicator of atmospheric circulation, to properties opaque clouds (altitude cover) Cloud Radiative Effect (CRE) in Tropics. We confront those with simulations by IPSL-CM6 CESM1 climate models using early 21st century emissions. Both overestimate average cloud cover. puts high too...

In previous work, a matched-field estimate of aircraft altitude which uses multiple over-the-horizon radar dwells was presented. This approach exploited the altitude dependent structure of the micro-multipath rays which result from reflections local to the aircraft. While it was shown that the multi-dwell matched-field estimate is able to accurately estimate altitude while using typical radar p...

Warfighter exposure to high terrestrial altitude continues to be a reality for the modern fighting force. Understanding the negative effects of altitude on cognitive performance is essential as the cognitive demands of many warfighting tasks are becoming increasingly complex. To date, little research has investigated the performance of multiple cognitive tasks in a high altitude environment. Th...

To investigate the effects of high-altitude exposure on response inhibition, event-related potential (ERP) components N2 and P3 were measured in Go/NoGo task. The participants included an 'immigrant' high-altitude group (who had lived at high altitude for three years but born at low altitude) and a low-altitude group (living in low altitude only). Although the behavioural data showed no signifi...

Adaptation takes place not only when going to high altitude, as generally accepted, but also when going down to sea level. Immediately upon ascent to high altitude, the carotid body senses the lowering of the arterial oxygen partial pressure due to a diminished barometric pressure. High altitude adaptation is defined as having three stages: 1) acute, first 72 hours, where acute mountain sicknes...

1. Alpine plants are at high risk because of climate change. Assessing the performance of alpine plant species across different altitudes is useful for predicting how they may respond to changing climate. Adaptation and plasticity of early life stages are of particular interest since seed germination and seedling establishment could be crucial life-history stages for environmental tracking and ...