Table 3.
Effects of beetroot juice treatment at submaximal exercise.
| Variable | Control | Beetroot juice |
|---|---|---|
| 40% VO2peak | ||
| Cardiac output (L·min−1) | 6.6 ± 0.3 | 6.8 ± 0.2 |
| Oxygen consumption (mL·kg−1·min−1) | 12.2 ± 2.0 | 9.5 ± 2.5* |
| Systolic blood pressure (mm Hg) | 129 ± 3.3 | 120.9 ± 4.1* |
| Diastolic blood pressure (mm Hg) | 82 ± 1.9 | 79.9 ± 2.1 |
| Mean blood pressure (mm Hg) | 97.3 ± 1.9 | 93.0 ± 2.5* |
| Heart rate (b·min−1) | 104.8 ± 3.0 | 102.0 ± 2.9 |
| Heart rate-systolic pressure product | 13,452 ± 573 | 12,367 ± 641* |
|
| ||
| 60% VO2peak | ||
| Cardiac output (L·min−1) | 9.3 ± 0.3 | 9.6 ± 0.4 |
| Oxygen consumption (mL·kg−1·min−1) | 17.5 ± 2.1 | 15.0 ± 2.4* |
| Systolic blood pressure (mm Hg) | 148.4 ± 4.0 | 141.9 ± 3.3* |
| Diastolic blood pressure (mm Hg) | 85.4 ± 1.5 | 85.0 ± 1.9 |
| Mean blood pressure (mm Hg) | 105.9 ± 2.4 | 103.6 ± 2.1 |
| Heart rate (b·min−1) | 132.6 ± 2.9 | 130.4 ± 3.2 |
| Heart rate-systolic pressure product | 19,785 ± 912 | 19,264.1 ± 819* |
|
| ||
| 80% VO2peak | ||
| Cardiac output (L·min−1) | 11.3 ± 0.6 | 11.4 ± 0.6 |
| Oxygen consumption (mL·kg−1·min−1) | 22.6 ± 3.0 | 19.5 ± 3.3* |
| Systolic blood pressure (mm Hg) | 162.8 ± 4.6 | 151.6 ± 4.3* |
| Diastolic blood pressure (mm Hg) | 87.5 ± 3.7 | 84.4 ± 2.1 |
| Mean blood pressure (mm Hg) | 109.9 ± 2.8 | 107.0 ± 2.1 |
| Heart rate (b·min−1) | 154.5 ± 2.8 | 153.0 ± 3.0 |
| Heart rate-systolic pressure product | 25,337 ± 889 | 23,146 ± 754* |
Values expressed in mean ± standard error measured at rest and at constant aerobic exercise workloads corresponding to 40%, 60% and 80% of subject's predetermined peak oxygen consumption (VO2peak). *Significantly different than control at P < 0.05.