Abstract
The paper considers how altitude affects the human body when athletes train at or for high altitude. The paper briefly discusses common methods of altitude training, altitude training and the effects of environment, physiological effects of altitude training, negative consequences of altitude training, and beneficial effects of altitude training on performance.

From the Paper
"Globalization has brought the world closer together not only in terms of commerce and communication, but also in the world of sports. Olympic participation in particular has increased to the point where large and small countries now compete in far more events than at any time in the past, and the ability to beam images of winners around the world has increased interest in how Olympians train. As runners from high-altitude countries have won numerous Olympic events as..."

Tags:altitude, altitude training, medical, health

Abstract
The paper discusses altitude training, which involves exercising and/or living at fixed heights for a length of time, in order to take advantage of the reduced oxygen. The paper examines how this condition is accompanied by other physiological disturbances, including mental toughness. The paper discusses how sports experts and other trained observers suggest that one should take caution about investing a large amount of time,money, and health, in a practice which promises only minimal benefits. The paper concludes that altitude training can decrease performance at sea-level, which would be counter-productive for the athlete.

Outline:
Introduction
Methods
Altitude Training and Effects of the Environment
Physiological Effects
Negative Effects
Conclusion
Bibliography

From the Paper
" A number of studies pointed to the value of lower oxygen cost of steady-state cycling and running after exposure to hypoxia as an observed but unexpected benefit of LHTL (McConnell 2006). Saunders and group found the oxygen cost of running was at an average of 3.3% lower after LHTL than after two interventions. Otherwise, there were no significant differences between or within subject groups for ventilation, heart rate, respiratory exchange ratio or hemoglobin mass. The absence of a change in R field likewise appeared to support the contention of improved mechanical efficiency after LHTL, such as increased use of carbohydrate."

Tags:hemoglobin, mass, swimmers, altitude, sickness

Abstract
In this article, the writer takes an in-depth look at the physiology of high altitude training. This is followed by a discussion of the limitations of high altitude training in terms of improving athletic performance.

From the Paper
"What happens to the body during altitude training and how does it affect performance. These are the two main questions asked and answered in this report. In this regard Armstrong defines high altitude training stating that it consists of athletic training carried out at high altitudes. Altitude can vary and with it both the oxygen and barometric pressure. In this regard Wilbur points out that as altitude increases the barometric pressure and the oxygen content of the air decrease. For example at an altitude of .."

Tags:high, altitude, training

Abstract
This paper first offers an explanation of high altitude and then goes on to describe the important changes that occur in the internal environment of the human body.

From the Paper
"The effects of high altitude on the human body is hypoxia, hyperventilation, changes in lung volume, changes in pulmonary diffusing capacity, changes in number of red blood cells, changes in hemoglobin concentration, and changes in cardiac output. The human body is also prone to high altitude stress which includes effects like increased secretion of ADH, redistribution of body fluids, and impairment of mental reactions. "

Tags:exposure, sufficient, oxygen, cellular, respiration, homeostasis, height, sea, level

Abstract
This paper examines the physiological changes that occur in the body at high altitude, particularly in respect to the heart. The paper examines what happens to the body during short-term exposure and long-term exposure to high altitude, and exposure to extremely high altitudes.

From the Paper
"Several circulatory changes mediated by stimulation of the carotid body which causes activation of the sympathetic nervous system are stimulated by short-term altitude exposure less than three or four days. These changes occur within a few minutes of altitude exposure and are related to a transient epinephrine secretion combined with a more sustained secretion of norepinephrine. These cause immediate changes which include an increase in ventilation, increased heart rate, increased cardiac output and an elevation of blood pressure. There is also an increase in coronary blood flow."

Tags:cardiopulmonary, high altitude, acclimatization

From the Paper
" Altitude and its effects on athletic performance will be discussed with regard to the following subtopics: adaptations the body makes as a person goes from sea level to a high altitude; changes brought about by aerobic compared to anaerobic exercises at high altitude; and the effects, positive or negative, of training at altitude. A drastic case study will be cited to demonstrate the magnitude of the effect of altitude change on physiology.
At altitudes of over 5,000 feet, the ability to perform physical work is affected--the higher the altitude, the more severe the effects. In general, one can expect a reduction in endurance capacity as measured by the maximal oxygen consumption of 3 to 3.5 percent for every 1,000 feet ascended above 5,000 feet. Work performance and maximum oxygen consumption are..."

Abstract
This paper examines acclimatization, the process by which the body adapts to changes in altitude. The body's various physiological responses to acclimatization are discussed, such as increased pulmonary ventilation and the presence of abnormally high numbers of red blood cells in the circulatory system known as polycythemia, among others. The paper concludes with a literature review which cites and analyzes various research studies in acclimatization.

Outline:
Increased Pulmonary Ventilation
Polycythemia
Rightward Shift in the Oxygen Dissociation Curve
Changes in Capillarization
Changes in Oxidative Enzymes Within Cells
References

From the Paper
" Increased resting and submaximal ventilation is observed in immediate response to altitude related hypoxia (Wyatt, 2002). This increased ventilation is achieved through increased volume and rate of breaths, and individual variation in hypoxic ventilatory response has been demonstrated (Wyatt, 2002). Research has shown that individuals with strong hypoxic ventilatory drives exhibit better performance at high altitudes than individuals with less efficient drives (Wyatt, 2002). The stimulated ventilation that results from exposure to high altitudes is due to aortic and carotid sensitivity to reduced PO2 in arterial blood. This increase in ventilation increases PO2 in the alveoli and reduces end-tidal partial pressure of carbon dioxide (PETCO2), which lends to reduced carbon dioxide and H+ in the blood. In response to these reductions during the initial few days of exposure to altitude, the kidneys gradually excrete bicarbonate (HCO3), which is associated with decreased plasma volume. Increased pulmonary ventilation also results in a reduction in total water in the body due to loss of water vapor that occurs during respiration, which results in rapid dehydration during acute altitude exposure (Wyatt, 2002)."

Tags:acclimatization, altitude, pulmonary, ventilation

From the Paper
"Normal physiologic function depends on the maintenance of a uniform internal environment. This is achieved through a variety of adaptive mechanisms which enable the body to respond to changes in the external environment. Adaptive phenomena become most evident in environmental extremes. Three such situations include high altitude, diving, and extremes of temperature. These adverse conditions test the body's ability to maintain its independence from continuous changes in the external world.

At high elevations, barometric pressure is markedly decreased (5:462). This is due to the fact that the weight of the atmosphere is considerably less than at sea level. One result of the decreased barometric pressure is fewer oxygen molecules per unit volume. This lower oxygen partial pressure (PO2) is the primary factor ... "

Abstract
This paper discusses how at altitudes above 5,000 feet, atmospheric pressure begins to drop below the levels required for optimal cognitive and physical functions and how this reduction of function caused by insufficient blood oxygen levels is known as hypoxia and exists in several different forms. The paper examines the different types of hypoxia and how at 10,000 feet, hypoxia is a very serious risk to aviators.

Outline:
Introduction
The Physiological Mechanism of Altitude-Induced Hypoxia
Types of Hypoxia
Signs and Symptoms of Altitude-Induced Hypoxia
Altitude-Induced Hypoxia Prevention

From the Paper
"Histotoxic Hypoxia refers to hypoxia specifically caused by toxins in the blood that interfere with the ability of hemoglobin to absorb oxygen even in the presence of sufficient quantities and at normal atmospheric pressure (Jepperson, 2007; USDOT, 2003). In that regard, alcohol is the most likely toxin to affect pilots, but other poisonous substances like cyanide and certain narcotics and other medications (including some sold over-the-counter) can also cause histotoxic hypoxia. Finally, Stagnant Hypoxia refers to insufficient oxygen absorption caused by underlying circulatory problems that reduce blood flow, and therefore, the efficient transport of oxygen, even where the quality of air, atmospheric conditions, and oxygen absorption by hemoglobin are normal (Jepperson, 2007; USDOT, 2003)."

Tags:altitude, blood, oxygen, levels

Abstract
This paper explains that the air travel industry is built on principles which maintain its safety records, including multiple redundant systems, and the ability of the pilot and crew to override the systems if they malfunction. The author points out that ?Controlled Flight Into Terrain (CFIT)? is responsible for more than half of all commercial aviation fatalities, making it one of the international aviation community's most pressing safety problems. The paper concludes by proposing a study comparing the accident rate of aircraft with EGPWS systems installed, aircraft with GPWS installed, and aircraft with neither installed.

Table of Contents
Introduction
Literature Review
Controlled Flight into Terrain
Approach and Landing Accidents
Advancements in the GPWS Systems
Minimum Safe Altitude Warning System (MSWA)
Methods and Procedure for the Study

From the Paper
"Non-precision approaches increase levels of risk ?significantly,? said Khatwa. The danger is even higher when pilots have a low exposure to such events. Assuming that accident characteristics can be observed in everyday conditions, the research went on to study correlations between ALAs and data from regular aircraft operations. In addition to the 4,000 normal flights, they considered almost 300 worldwide ALAs, as well as other incidents, using International Civil Aviation Organization statistics. Some 287 fatal ALAs from 1980 to 1996 represented an annual incidence of about 17 events. The researched projected that with increasing levels of air travel, ALA incidents were likely to rise to 23 a year. About 50 percent of all accidents are ALAs, and the most dominant circumstance was controlled flight into terrain (CFIT). Almost 75 percent of ALAs involved approaches to airports with no glide slope."

Tags:redundant, override, fatalities, egpws, approaches