Cardiovascular Deconditioning and Exercise

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Cardiovascular Deconditioning and Exercise

Stenger, Michael B. / Laurie, Steven S. / Lee, Stuart M. C. / Platts, Steven H.

The cardiovascular system in the human body has evolved to support function in the Earth’s gravity environment involving bipedal stance and ambulation. Given that blood and body fluids are drawn downward during standing, autonomic, endocrine, and vascular responses are critical to returning blood from the lower body to the heart and perfuse the brain. Many of these functions are not required during spaceflight, and, in combination with altered blood flow and pressures, results in cardiovascular deconditioning. When not opposed by countermeasures performed during spaceflight to simulate physical work or gravity on Earth, cardiovascular deconditioning can result in low blood volume, cardiac atrophy, vascular dysfunction, orthostatic intolerance, and reduced work capacity, affecting an astronaut’s ability to perform work during and immediately after spaceflight.

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Document information

Title :

Cardiovascular Deconditioning and Exercise

Contributors:

Young, Laurence R. (editor) / Sutton, Jeffrey P. (editor) / Stenger, Michael B. (author) / Laurie, Steven S. (author) / Lee, Stuart M. C. (author) / Platts, Steven H. (author) / Norsk, Peter

Published in:

Handbook of Bioastronautics ; Chapter : 20 ; 129-153

Publication date :

2021-08-17

Size :

25 pages

ISBN :

978-3-319-12191-8 , 978-3-319-12190-1

DOI :

https://doi.org/10.1007/978-3-319-12191-8_20

Type of media :

Article/Chapter (Book)