Lower body negative pressure identifies altered central vein characteristics without accompanying changes to baroreflexes in astronauts within hours of landing.

Results Resting pre-test postflight variables We identified elevations to resting TPR immediately following spaceflight and prior to LBNP, accompanied by close-to-significant increases in SBP and DBP, and reductions to Q ̇ , with marked reduction in SV (Table 2 ).

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