Table 1.
Baseline hemodynamic and transcranial Doppler data recorded 20 min before ingesting both drinks and baseline laser Doppler perfusion for microvascular measurements
| Energy drink | Water | |
|---|---|---|
| Systolic blood pressure (mmHg) | 114 ± 2 | 113 ± 2 |
| Mean blood pressure (mmHg) | 87 ± 1 | 86 ± 1 |
| Diastolic blood pressure (mmHg) | 73 ± 1 | 73 ± 1 |
| Heart rate (beats min−1) | 59 ± 2 | 60 ± 1 |
| Double product (mmHg beats min−1) | 6,742 ± 197 | 6,740 ± 160 |
| Stroke volume (mL) | 83 ± 2 | 83 ± 2 |
| Cardiac output (L min−1) | 4.83 ± 0.11 | 4.93 ± 0.12 |
| Total peripheral resistance (mmHg min L−1) | 18.1 ± 0.5 | 17.8 ± 0.5 |
| Cerebral blood flow velocity (cm s−1) | 65 ± 4 | 61 ± 3 |
| Cerebrovascular resistance (mmHg s cm−1) | 1.46 ± 0.09 | 1.48 ± 0.09 |
| End-tidal carbon dioxide (mmHg) | 36.5 ± 0.4 | 35.9 ± 0.5 |
| Acetylcholinea (AUb) | 27.8 ± 3.4 | 25.9 ± 3.3 |
| Sodium Nitroprussidea (AUb) | 20.2 ± 2.3 | 21.2 ± 3.2 |
Data are presented as mean ± SE; n = 25 (12 women, 13 men)
aPre-drink skin blood flux related baseline values, average over 30 s
bAU means arbitrary units