Why the study?
Does 15 days of simulated microgravity (head-down bed rest) alter aortic baroreflex control of heart rate in male subjects?
Population
7 male subjects, mean age 38 +/- 3 yr
Comparison
15 days of bed rest in the 6 degrees head-down… vs Baseline conditions (pre-bed rest)
Design
Cohort
Follow-up
15 days
Authors
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May indicate baroreflex adaptation to simulated microgravity; hypothesis-generating and leaves open relevance to spaceflight or clinical bed rest.
Does 15 days of simulated microgravity (head-down bed rest) alter aortic baroreflex control of heart rate in male subjects?
Simulated microgravity via 15 days of head-down bed rest increases aortic-cardiac baroreflex responsiveness, potentially due to physiological adaptations such as reduced blood volume.
Crandall et al. (1994) studied this question.
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