Influence of Natural Hypobaric Hypoxic Conditions on Dynamic Visual Performance

Krusche, Till; Limmer, Mirjam; Jendrusch, Gernot; Platen, Petra

doi:10.1089/ham.2019.0033

Cited by 7 publications

(9 citation statements)

References 50 publications

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“…On an 11-hour, 30-kilometer field climb, the energy consumption is 310-450 kcal per hour. 8 Pearson correlation analysis showed a significant correlation between the two methods of calculating energy consumption (r=0.761, p=0.017). Athletes from 7:00 to 8:00 is the main activity route within 1 hour after departure.…”

Section: Energy Consumption Analysis Of Rock Climbingmentioning

confidence: 96%

Muscle Strength Coordination Training for Athletes in Mountaineering Sports

Wang

Luo

Yang

et al. 2023

Rev Bras Med Esporte

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Introduction Rock climbing is a physical activity that requires excellent physical conditioning. In addition to improving physical fitness and motor coordination, rock climbing requires constant improvements in muscle coordination skill training to enhance its modern tactics. Objective Explore the muscular coordination skill training of rock climbers. Methods A random sample of 8 athletes were assigned to the experiment involving the measurement of athletes’ body composition, serum creatine kinase and blood urea levels, and other biomarkers collected before and after the trial. Results There was a significant negative correlation between dynamic balance and motor coordination ability after training in extreme rock climbing sports. On the second day after the rock climbing exercise, the volunteers’ body weight and fat content significantly reduced, and the concentration of creatine kinase (CK) and blood urea (BU) increased significantly. Conclusion The exploration of extreme sports’ effect on improving athletes’ muscle coordination ability showed that strength and coordination should be enhanced in rock climbing. Level of evidence II; Therapeutic studies - investigation of treatment outcomes.

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Section: Energy Consumption Analysis Of Rock Climbingmentioning

confidence: 96%

Muscle Strength Coordination Training for Athletes in Mountaineering Sports

Wang

Luo

Yang

et al. 2023

Rev Bras Med Esporte

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“… Cymerman et al (2005) investigated oculomotor reflexes, including pupil diameter (PD), constriction amplitude (CA), constriction latency (CL), and saccadic velocity (SV) during acute hypobaric hypoxia over a period of 2 weeks at 4,300 m with measurements taken every 2 days. They found that PD, CA, and CL were significantly lower than baseline levels and remained up to 14 days ( Krusche et al, 2020 ). Additionally, under different light intensities of 12 cd/m 2 , 1 cd/m 2 , and 0.1 cd/m 2 , the corresponding PDs were 0.55 mm, 0.46 mm, and 0.29 mm, respectively.…”

Section: The Influence Of Hypobaric Hypoxia On Ocular Structurementioning

confidence: 99%

“…As dynamic visual performance is an important factor in ensuring the safety of high-altitude flight, Krusche et al (2020) studied the changes in dynamic visual performance of healthy individuals at 3,647 and 4,554 m. Under the condition that the brightness of the display and the distance from human eyes were stable and consistent, they detected four different motion contrasts: 100, 50, 30, and 20%. The results showed that for 30 and 20% contrast, the dynamic vision performance gradually decreased as the altitude increased, while under 20% contrast, the dynamic vision above the fovea of the macula decreased significantly.…”

Section: Influences On Visual Functionmentioning

confidence: 99%

Influence of hypobaric hypoxic conditions on ocular structure and biological function at high attitudes: a narrative review

Wang,

Yu,

Liu

et al. 2023

Front. Neurosci.

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BackgroundWith the development of science and technology, high-altitude environments, involving aviation, aerospace, and mountainous regions, have become the main areas for human exploration, while such complex environments can lead to rapid decreases in air and oxygen pressure. Although modern aircrafts have pressurized cabins and support equipment that allow passengers and crew to breathe normally, flight crew still face repeated exposure to hypobaric and hypoxic conditions. The eye is a sensory organ of the visual system that responds to light and oxygen plays a key role in the maintenance of normal visual function. Acute hypoxia changes ocular structure and function, such as the blood flow rate, and can cause retinal ischemia.MethodsWe reviewed researches, and summarized them briefly in a review.ResultsThe acute hypobaric hypoxia affects corneal, anterior chamber angle and depth, pupils, crystal lens, vitreous body, and retina in structure; moreover, the acute hypoxia does obvious effect on visual function; for example, vision, intraocular pressure, oculometric features and dynamic visual performance, visual field, contrast sensitivity, and color perception.ConclusionWe summarized the changes in the physiological structure and function of the eye in hypoxic conditions and to provide a biological basis for the response of the human eye at high-altitude.

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“…Given the complexity of the development of these diseases and the adaptability relationships, it has been possible to generate multiple publications that have contributed to their understanding, such as sleep disorders (8), simulation tests in hypoxic states (9), physiological and genetic considerations in age groups (10,11), treatments (12), and epidemiological studies (13,14). However, the only study that we observed denotes a scarce production in the scientific production on this area (15).…”

Section: Introductionmentioning

confidence: 98%

Adaptation and altitude sickness: A 40-year bibliometric analysis and collaborative networks

Zila-Velasque

Grados-Espinoza

Morán‐Mariños

et al. 2023

Front. Public Health

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Introduction:We analyze the scientific production and collaboration networks of studies based on adaptation and altitude diseases in the period 1980–2020.MethodsThe publications were extracted from journals indexed in Scopus. The bibliometric analysis was used to analyze the scientific production, including the number of annual publications, the documents, and the characteristics of the publications. With the VOSviewer software, the analysis of collaborative networks, productivity of the countries, as well as the analysis of the co-occurrence of keywords were visualized.Results15,240 documents were registered, of which 3,985 documents were analyzed. A significant trend was observed in the number of publications (R2: 0.9847; P: < 0.001), with annual growth of 4.6%. The largest number of publications were original articles (77.8%), these published more frequently in the journal “Altitude Medicine and Biology”. The largest number of countries were from Europe and Asia; however, the largest collaboration network was with the United States. Of the countries with high altitudes, China and Peru ranked first in scientific productivity. The research priorities were on the adaptation mechanism (37.1%), mainly anoxia and respiratory function. Acute mountain sickness (18.4%) and pulmonary edema (14.7%) were the most reported diseases. Of the top 10 institutions, “University of Colorado” and “Universidad Peruana Cayetano Heredia” contributed more than 100 publications.ConclusionsScientific production on adaptation and altitude illnesses continues to grow. The United States and United Kingdom present collaborative networks with high-altitude countries. The research is aimed at studying the mechanisms of adaptation to altitude and acute mountain sickness.

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Influence of Natural Hypobaric Hypoxic Conditions on Dynamic Visual Performance

Cited by 7 publications

References 50 publications

Muscle Strength Coordination Training for Athletes in Mountaineering Sports

Muscle Strength Coordination Training for Athletes in Mountaineering Sports

Influence of hypobaric hypoxic conditions on ocular structure and biological function at high attitudes: a narrative review

Adaptation and altitude sickness: A 40-year bibliometric analysis and collaborative networks

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