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  • Title: Effect of 21 days head-down bed rest on heart rate and blood pressure variability and orthostatic tolerance in men.
    Author: Zheng J, Zhang LF, Wei J, Wang XB.
    Journal: J Gravit Physiol; 1996 Sep; 3(2):38-9. PubMed ID: 11540274.
    Abstract:
    Healthy males were tested for orthostatic tolerance during and following 21 days head-down bed rest. ECG and blood pressure were measured. Ten out of the 15 subjects were able to complete the head-up tilt (HUT) test following bed rest, and changes in heart rate dynamics and blood pressure were observed in both finishers and non-finishers. Specific results are presented and discussed.
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