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The importance of exercising in space
1School of Sport, Exercise and Health Sciences, University College Chichester, UK. ah99s1@ucc.ac.uk
Interdisciplinary Science Reviews : ISR
|July 20, 2005
Summary
Astronauts face physiological changes in microgravity, including fluid shifts and bone/muscle loss. Exercise helps, but new countermeasures are vital for long-duration space missions.
Area of Science:
- Space Medicine
- Human Physiology
- Gravitational Biology
Background:
- Microgravity exposure causes significant physiological deconditioning in astronauts.
- These changes impact cardiovascular and musculoskeletal systems, affecting post-flight function.
Purpose of the Study:
- To outline the physiological consequences of microgravity on astronauts.
- To discuss the role of countermeasures, particularly exercise, in mitigating these effects.
Main Methods:
- Review of physiological adaptations to microgravity.
- Analysis of the effectiveness of exercise as a spaceflight countermeasure.
Main Results:
- Microgravity induces headward fluid shifts, orthostatic intolerance, reduced cardiac output, and musculoskeletal deconditioning.
- Exercise has proven effective in maintaining astronaut health for over a year but does not prevent all degradation.
Conclusions:
- Current countermeasures, primarily exercise, are insufficient for extended missions.
- Development of novel countermeasures is essential for future long-duration space exploration, such as Mars missions.
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