Table 3.
Cardiac autonomic responses at baseline fand during submaximal exercise with nitrate-rich beetroot juice compared to control (N = 13).
| Variable | Beetroot juice | Control |
|---|---|---|
| HF (nu) | 48.5 ± 5.1 | 40.2 ± 5.0 |
| LF (nu) | 66.7 ± 8.0 | 73.6 ± 7.4 |
| LF/HF | 2.4 ± 0.4 | 1.7 ± 0.3 |
|
| ||
| 40% VO2peak | ||
| HF (nu) | 30.8 ± 3.0 | 29.1 ± 4.5 |
| LF (nu) | 99.8 ± 9.3 | 103 ± 13.1 |
| LF/HF | 5.3 ± 1.1 | 3.6 ± 0.6 |
|
| ||
| 80% VO2peak | ||
| HF (nu) | 10.0 ± 0.9 | 10.0 ± 1.8 |
| LF(nu) | 99.0 ± 22.4 | 114.5 ± 21.6 |
| LF/HF | 11.5 ± 2.6 | 10.6 ± 1.6 |
Values are means ± standard errors. HF: high frequency; LF: low frequency; nu: normalized unit.