The Effects of High Altitude Climbing on Respiratory Parameters

Sönmez, Gül Tiryaki; Özen, Şerife; Yüktaşir, Bekir; Yalçın, Birol; Özen, Güçlü; Sonmez, Sedat; Demirel, Nurcan

doi:10.2478/v10036-009-0009-2

Cited by 1 publication

(1 citation statement)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In a recent study, Sonmez et al [40] measured vital capacity at different altitudes and the results showed that there was no statistically significant difference in vital capacity values after the measurements are taken at 1520 m, 3200 m, and 4200 m during one-week long climbing to Mountain Ararat (5138 m). The O 2 pulmonary diffusing capacity remains unchanged at HAs when compared to the capacity attained at sea level [41].…”

Section: Acclimatizationmentioning

confidence: 99%

Effects of High Altitude on Sleep and Respiratory System and Theirs Adaptations

San

Polat

Cingi

et al. 2013

The Scientific World Journal

View full text Add to dashboard Cite

High-altitude (HA) environments have adverse effects on the normal functioning body of people accustomed to living at low altitudes because of the change in barometric pressure which causes decrease in the amount of oxygen leading to hypobaric hypoxia. Sustained exposure to hypoxia has adverse effects on body weight, muscle structure and exercise capacity, mental functioning, and sleep quality. The most important step of acclimatization is the hyperventilation which is achieved by hypoxic ventilatory response of the peripheral chemoreceptors. Hyperventilation results in increase in arterial carbondioxide concentration. Altitude also affects sleep and cardiac output, which is the other determinant of oxygen delivery. Upon initial exposure to HA, the resting pulse rate increases rapidly, but with acclimatization, heart rate and cardiac output tend to fall. Another important component that leads to decrease in cardiac output is the reduction in the stroke volume with acclimatization. During sleep at HA, the levels of CO2 in the blood can drop very low and this can switch off the drive to breathe. Only after the body senses a further drop in O2 levels breathing is started again. Periodic breathing is thought to result from instability in the control system through the hypoxic drive or the response to CO2.

show abstract

Section: Acclimatizationmentioning

confidence: 99%