Table 1 Definition of lower body negative pressure data points.

Time	Definition
Baseline	Peak SBP after 15 min supine rest
Noise	Peak SBP with suction engine on, 5 min after baseline
Nadir	Lowest SBP during lower body negative pressure
Overshoot	Highest SBP within 10 beats of release of suction
Return to baseline	Steady state SBP within 60 s of overshoot

SBP, systolic blood pressure.