Condition | Stage | ANOVA | |||||
---|---|---|---|---|---|---|---|
Pre-LBNP | Severe LBNP | End of LBNP | Condition | Stage | Interaction | ||
VA blood flow, mL/min | Air | 141.8 ± 51.5 | 116.8 ± 53.5† | 92.2 ± 42.0†‡ | 0.465 | < 0.001 | 0.102 |
CO2 | 171.1 ± 51.7 | 124.8 ± 42.3† | 85.5 ± 34.8†‡ | ||||
ICA blood flow, mL/min | Air | 352.2 ± 87.8 | 302.5 ± 104.5 | 251.2 ± 66.2† | 0.153 | < 0.001 | 0.061 |
CO2 | 459.8 ± 100.5* | 356.9 ± 76.7† | 229.6 ± 54.1†‡ | ||||
VA diameter, cm | Air | 0.37 ± 0.05 | 0.36 ± 0.04 | 0.35 ± 0.05† | 0.519 | < 0.001 | 0.861 |
CO2 | 0.36 ± 0.05 | 0.35 ± 0.04† | 0.34 ± 0.05† | ||||
ICA diameter, cm | Air | 0.49 ± 0.05 | 0.47 ± 0.05 | 0.46 ± 0.04† | 0.901 | 0.001 | 0.762 |
CO2 | 0.49 ± 0.04 | 0.48 ± 0.05 | 0.46 ± 0.06† | ||||
VA velocity, cm/s | Air | 21.86 ± 3.06 | 18.45 ± 5.58† | 15.50 ± 3.95† | 0.297 | < 0.001 | 0.063 |
CO2 | 27.43 ± 6.24 | 21.75 ± 6.67† | 15.39 ± 2.81†‡ | ||||
ICA velocity, cm/s | Air | 31.66 ± 6.13 | 28.98 ± 8.11 | 24.61 ± 5.06† | 0.206 | < 0.001 | 0.043 |
CO2 | 40.75 ± 6.91* | 34.02 ± 10.6† | 22.77 ± 4.52†‡ |