Why the study?
Does long-term exposure to microgravity alter the power-law scaling β of heart rate variability in healthy astronauts?
Population
7 healthy astronauts (5 men, mean age 52.0±4.2 years)
Comparison
Long-duration spaceflight with exposure to… vs Earth conditions
Design
Cohort
Follow-up
about 6 months
Authors
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Altered astronaut HRV scaling signals deconditioning risk in microgravity; leaves open whether countermeasures can restore intrinsic autonomic regulation.
Does long-term exposure to microgravity alter the power-law scaling β of heart rate variability in healthy astronauts?
Long-term exposure to microgravity significantly alters the intrinsic autonomic regulatory system, as evidenced by changes in the power-law scaling of heart rate variability.
Otsuka et al. (2015) studied this question.
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