| Effects of acceleration in the G(z) axis on human cardiopulmonary responses to exercise. | |
| | |
MedLine Citation:
|
PMID: 21437604 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
|
The aim of this paper was to develop a model from experimental data allowing a prediction of the cardiopulmonary responses to steady-state submaximal exercise in varying gravitational environments, with acceleration in the G(z) axis (a (g)) ranging from 0 to 3 g. To this aim, we combined data from three different experiments, carried out at Buffalo, at Stockholm and inside the Mir Station. Oxygen consumption, as expected, increased linearly with a (g). In contrast, heart rate increased non-linearly with a (g), whereas stroke volume decreased non-linearly: both were described by quadratic functions. Thus, the relationship between cardiac output and a (g) was described by a fourth power regression equation. Mean arterial pressure increased with a (g) non linearly, a relation that we interpolated again with a quadratic function. Thus, total peripheral resistance varied linearly with a (g). These data led to predict that maximal oxygen consumption would decrease drastically as a (g) is increased. Maximal oxygen consumption would become equal to resting oxygen consumption when a (g) is around 4.5 g, thus indicating the practical impossibility for humans to stay and work on the biggest Planets of the Solar System. |
| | |
Authors:
|
Julien Bonjour; Aurélien Bringard; Guglielmo Antonutto; Carlo Capelli; Dag Linnarsson; David R Pendergast; Guido Ferretti |
Related Documents
:
|
17379494 - The bronchoprotective effect of deep inspiration is flow rate dependent. 16107914 - Lung function measured by impulse oscillometry and spirometry following eucapnic volunt... 12424484 - Exhaled nitric oxide collected with two different mouthpieces: a study in asthmatic pat... 10484584 - Airway obstruction during exercise and isocapnic hyperventilation in asthmatic subjects. 12042474 - Changes in circulatory antioxidant status in horses during prolonged exercise. 16024524 - Hypohydration impairs endurance exercise performance in temperate but not cold air. |
Publication Detail:
|
Type: JOURNAL ARTICLE Date: 2011-3-25 |
Journal Detail:
|
Title: European journal of applied physiology Volume: - ISSN: 1439-6327 ISO Abbreviation: - Publication Date: 2011 Mar |
Date Detail:
|
Created Date: 2011-3-25 Completed Date: - Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 100954790 Medline TA: Eur J Appl Physiol Country: - |
Other Details:
|
Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
|
Département de Neurosciences Fondamentales, Université de Genève, Rue Michel Servet 1, 1211, Geneve 4, Switzerland. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
|
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Oral tyrosine supplementation improves exercise capacity in the heat.
Next Document: Combined effects of chronic alcohol consumption and physical activity on bone health: study in a rat...