Why the study?
Does long-duration spaceflight increase orthostatic intolerance compared to short-duration spaceflight in astronauts?
Population
26 astronauts
Comparison
Long-duration spaceflight (129-190 days) vs Short-duration spaceflight
Design
Cohort
Follow-up
Landing day (postflight)
Authors
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Long-duration spaceflight was associated with higher orthostatic intolerance; extends short-duration data but remains hypothesis-generating for countermeasures.
Does long-duration spaceflight increase orthostatic intolerance compared to short-duration spaceflight in astronauts?
Long-duration spaceflight markedly increases the risk of orthostatic intolerance compared to short-duration missions, potentially due to decreased cardiac contractile function.
Meck et al. (2001) studied this question.
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