scholarly journals ACCLIMATIZATION TO MEDIUM ALTITUDE AND ATHLETIC PERFORMANCE IN MEXICO CITY : Report from the Research Committee for Altitude Training, the Japan Amateur Sports Association

1967 ◽  
Vol 11 (3) ◽  
pp. 117-126
Author(s):  
Kazuo ASAHINA ◽  
Michio IKAI ◽  
Shinkichi OGAWA ◽  
Yoshio KURODA
Keyword(s):  
Mexico City ◽  
Athletic Performance ◽  
Altitude Training ◽  
Research Committee

The spirit of sport, morality, and hypoxic tents: logic and authenticity

2007 ◽  
Vol 32 (2) ◽  
pp. 289-296 ◽  
Author(s):  
David Cruise Malloy ◽  
Robert Kell ◽  
Rod Kelln
Keyword(s):  
Athletic Training ◽  
Athletic Performance ◽  
Aerobic Performance ◽  
Altitude Training ◽  
Blood Doping ◽  
Hypoxic Environment ◽  
Moral Behaviour ◽  
World Anti Doping Agency ◽  
Future Policy ◽  
Spirit Of Sport

The World Anti-Doping Agency (WADA) has recently made a decision to allow the use of hypoxic tents amid a significant amount of controversy over the morality of their use for athletic training purposes. Currently, altitude training is considered moral, but other means of improving aerobic performance are not; for example, blood doping. Altitude training and blood doping have similar results, but the methods by which the results are achieved differ greatly. The controversy lies in how the use of a hypoxic device falls within WADA’s philosophy, which will then dictate future policy. This paper discusses the influence of a hypoxic environment on human physiology, altitude training’s influence on athletic performance, the concept of authentic physiology, and moral behaviour that is the foundation for logical debate.

ATHLETIC PERFORMANCE OF SWIMMERS AFTER ALTITUDE TRAINING (2,300 M ABOVE SEA LEVEL) IN VIEW OF THEIR BLOOD MORPHOLOGY CHANGES

2012 ◽  
Vol 29 (2) ◽  
pp. 115-120
Author(s):  
Marcin Siewierski ◽  
Paweł Słomiński ◽  
Robert Białecki ◽  
Jakub Adamczyk
Keyword(s):  
Sea Level ◽  
Athletic Performance ◽  
Altitude Training ◽  
Blood Morphology ◽  
Morphology Changes

scholarly journals Effect of Training at Altitude

1997 ◽  
Vol 3 (2) ◽  
pp. 27-29
Author(s):  
Pak Kwong CHUNG
Keyword(s):  
Sea Level ◽  
Mexico City ◽  
Exercise Performance ◽  
Olympic Games ◽  
Endurance Performance ◽  
Lower Pressure ◽  
Altitude Training ◽  
Beneficial Effects ◽  
Air Resistance ◽  
Physiologic Responses

LANGUAGE NOTE | Document text in Chinese; abstract in English only.In 1968, when the Summer Olympic Games were scheduled to be held in Mexico City, at an altitude of 2,300 meters above sea level, considerable attention was directed at the questions of how altitude would affect exercise performance. During the preparation for the Mexico City Olympics, many concerns existed about the possible beneficial effects of the lower pressure and air resistance at the altitude for events involving speed and power; and the possible detrimental effects of the reduced oxygen at the altitude for the endurance events. What are the acute physiologic responses to altitude? Can altitude training improve endurance performance at sea level? All such questions would be explored in this article.

scholarly journals PO-120 Research on the fluctuation of Reticulocyte during different altitude training patterns in swimming athletes

2018 ◽  
Vol 1 (4) ◽  
Author(s):  
Xiangang Yang ◽  
Yang Liu ◽  
Chenggang Qu
Keyword(s):  
Aerobic Capacity ◽  
Athletic Performance ◽  
Physiological Function ◽  
Reticulocyte Count ◽  
Venous Blood ◽  
Interactive Effects ◽  
Altitude Training ◽  
Minimum Level ◽  
Bone Marrow Stimulation ◽  
Automated Hematology Analyzer

Objective To explore the fluctuation of reticulocyte during different altitude training in swimming athletes and their difference between altitude training focused on special aerobic capacity and altitude training focused on high load and sprint, to provide the theory basis for further analyze the altitude training improve the physiological function and athletic performance. Methods Twenty female swimming athletes participated in altitude training for four weeks, which could be divided into two patterns, special aerobic capacity group(G1, n=9) and intensity and sprint group(G2, n=11). Fasting venous blood samples were drawn for each week were determined using Beckman Coulter LH780 automated hematology analyzer, including Reticulocyte related parameters such as Reticulocyte percentage (Ret%), Reticulocyte count (Ret#) and immature Reticulocyte fraction (IRF) and also erythrocyte related parameters. Results (1) In G1, Ret%, Ret# and MRV showed continuous decline and represented minimum level in 4th week. While IRF increased during 2nd and 3rd, and then decreased in 4th week. (2) In G2, Ret%, Ret# and MRV were relatively steady during 1st and 2nd week. Ret% and Ret# gave an increased in 3rd week, and then decreased in 4th week, while MRV decreased in 3rd week and increased in 4th week. IRF significantly decreased in latter period compared to earlier period. (3) There were no significant changes for RBC, HCT and HGB in both G1 and G2. MCV, MCH, MCHC and RDW showed improved in later stages compared to their in earlier stages for all in G1, while MCV increased and then decreased, MCH and MCHC continued decline, and RDW kept at sustaining higher levels in G2. Conclusions (1) Reticulocytes were not in accordance with the trend of erythrocyte during different altitude training. Compared to erythrocyte, the behavior of Reticulocyte could reflect erythropoiesis, and IRF could more sensitively detect the change of bone marrow stimulation in particular. (2) The variability of Reticulocytes during altitude training was influenced by hypoxia, training and especially their interactive effects. In aspect of training type, it was crucial for considering the fluctuation of training load and athletes’ adaptation during different patterns.   

scholarly journals Iron insufficiency diminishes the erythropoietic response to moderate altitude exposure

2019 ◽  
Vol 127 (6) ◽  
pp. 1569-1578
Author(s):  
Kazunobu Okazaki ◽  
James Stray-Gundersen ◽  
Robert F. Chapman ◽  
Benjamin D. Levine
Keyword(s):  
Retrospective Study ◽  
Iron Deficiency ◽  
Prospective Study ◽  
Sea Level ◽  
Athletic Performance ◽  
Iron Supplementation ◽  
Endurance Athletes ◽  
Altitude Training ◽  
Moderate Altitude ◽  
Altitude Exposure

The effects of iron stores and supplementation on erythropoietic responses to moderate altitude in endurance athletes were examined. In a retrospective study, red cell compartment volume (RCV) responses to 4 wk at 2,500 m were assessed in athletes with low ( n = 9, ≤20 and ≤30 ng/mL for women and men, respectively) and normal ( n = 10) serum ferritin levels ([Ferritin]) without iron supplementation. In a subsequent prospective study, the same responses were assessed in athletes ( n = 26) with a protocol designed to provide sufficient iron before and during identical altitude exposure. The responses to a 4-wk training camp at sea level were assessed in another group of athletes ( n = 13) as controls. RCV and maximal oxygen uptake (V̇o2max) were determined at sea level before and after intervention. In the retrospective study, athletes with low [Ferritin] did not increase RCV (27.0 ± 2.9 to 27.5 ± 3.8 mL/kg, mean ± SD, P = 0.65) or V̇o2max (60.2 ± 7.2 to 62.2 ± 7.5 mL·kg−1·min−1, P = 0.23) after 4 wk at altitude, whereas athletes with normal [Ferritin] increased both (RCV: 27.3 ± 3.1 to 29.8 ± 2.4 mL/kg, P = 0.002; V̇o2max: 62.0 ± 3.1 to 66.2 ± 3.7 mL·kg−1·min−1, P = 0.003). In the prospective study, iron supplementation normalized low [Ferritin] observed in athletes exposed to altitude ( n = 14) and sea level ( n = 6) before the altitude/sea-level camp and maintained [Ferritin] within normal range in all athletes during the camp. RCV and V̇o2max increased in the altitude group but remained unchanged in the sea-level group. Finally, the increase in RCV correlated with the increase in V̇o2max [( r = 0.368, 95% confidence interval (CI): 0.059–0.612, P = 0.022]. Thus, iron deficiency in athletes restrains erythropoiesis to altitude exposure and may preclude improvement in sea-level athletic performance. NEW & NOTEWORTHY Hypoxic exposure increases iron requirements and utilization for erythropoiesis in athletes. This study clearly demonstrates that iron deficiency in athletes inhibits accelerated erythropoiesis to a sojourn to moderate high altitude and may preclude a potential improvement in sea-level athletic performance with altitude training. Iron replacement therapy before and during altitude exposure is important to maximize performance gains after altitude training in endurance athletes.

scholarly journals Is There an Ibero-American “Youthology”? A Conversation

2019 ◽  
Vol 1 (2) ◽  
pp. 307-314 ◽  
Author(s):  
Carles Feixa Pàmpols ◽  
Maritza Urteaga Castro-Pozo
Keyword(s):  
Mexico City ◽  
Buenos Aires ◽  
Critical Study ◽  
Social Anthropology ◽  
Research Committee ◽  
Santiago De Chile ◽  
International Sociological Association ◽  
National School ◽  
Youth Research ◽  
The University

This article reproduces a conversation between Carles Feixa and Maritza Urteaga, researchers in youth studies, whose paths converge in the critical study of contemporary youth culture. Carles Feixa, PhD, is Professor of Social Anthropology at the Pompeu Fabra University (Barcelona) and holds a Doctorate Honoris Causa from the University of Manizales (Colombia). He was previously a lecturer at the University of Lleida, and has been visiting scholar in Rome, Mexico City, Paris, Berkeley, Buenos Aires, Santiago de Chile, Newcastle and Lima. He has also been a public policy consultant for the United Nations and VP for Europe of the “Sociology of Youth” research committee of the International Sociological Association. In 2017 he was awarded the icrea Academia Award by the Autonomous Government of Catalonia and an Advanced Grant from the European Research Council. Maritza Urteaga, PhD, is Research Professor at the National School of Anthropology and History in Mexico City, and a level ii member of the National System of Researchers in Mexico. This conversation reviews Feixa’s career, from its beginnings in the 80s to the present, to determine whether there is something that can be called Ibero-American “youthology”.

The biochemistry of drugs and doping methods used to enhance aerobic sport performance

2008 ◽  
Vol 44 ◽  
pp. 63-84 ◽  
Author(s):  
Chris E. Cooper
Keyword(s):  
Oxygen Uptake ◽  
Oxygen Content ◽  
Oxygen Delivery ◽  
Sport Performance ◽  
Blood Substitutes ◽  
Altitude Training ◽  
Blood Oxygen ◽  
Oxygen Carriers ◽  
Sports Performance ◽  
Blood Doping

Optimum performance in aerobic sports performance requires an efficient delivery to, and consumption of, oxygen by the exercising muscle. It is probable that maximal oxygen uptake in the athlete is multifactorial, being shared between cardiac output, blood oxygen content, muscle blood flow, oxygen diffusion from the blood to the cell and mitochondrial content. Of these, raising the blood oxygen content by raising the haematocrit is the simplest acute method to increase oxygen delivery and improve sport performance. Legal means of raising haematocrit include altitude training and hypoxic tents. Illegal means include blood doping and the administration of EPO (erythropoietin). The ability to make EPO by genetic means has resulted in an increase in its availability and use, although it is probable that recent testing methods may have had some impact. Less widely used illegal methods include the use of artificial blood oxygen carriers (the so-called ‘blood substitutes’). In principle these molecules could enhance aerobic sports performance; however, they would be readily detectable in urine and blood tests. An alternative to increasing the blood oxygen content is to increase the amount of oxygen that haemoglobin can deliver. It is possible to do this by using compounds that right-shift the haemoglobin dissociation curve (e.g. RSR13). There is a compromise between improving oxygen delivery at the muscle and losing oxygen uptake at the lung and it is unclear whether these reagents would enhance the performance of elite athletes. However, given the proven success of blood doping and EPO, attempts to manipulate these pathways are likely to lead to an ongoing battle between the athlete and the drug testers.

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